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COMPAQ 134110-B21 Laptop Replacement Battery

  • COMPAQ Evo N400,N410 / Armada M700 Series, Prosignia 170, Evo N400C,N410C,N410C-470037,N410C-470039,N410C-470040 Series Laptop Battery
    •
    Price: £30 inc. VAT
    (Shipping only £2.50 + £0.5 per item)

    Currency of Different Countries:
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    Product Information :
    Info: Laptop Replacement Battery
    Battery Type: Li-ion
    Voltage: 14.80V
    Capacity: 4400mAh
    Color: Black
    Dimension: 121.90 x 106.20 x 20.30 mm
    Product Type: Brand New Replacement Battery
    WEIGHT: 542.00(g)
    Compatible Part Numbers:
    134110-B21 134111-B21 135213-001
    135213-002 135214-001 135214-002
    144558-B21 167299-002 167935-001
    205844-002 230608-001
    This battery is also compatible with the following models of :
    Compaq Evo Series
    Compaq Evo N400Compaq Evo N410
    Compaq Armada M700 Series
    Armada M700Armada M700-140141-BF6
    Compaq Armada M700-124898 Series
    Armada M700-124898-002Armada M700-124898-022
    Armada M700-124898-032Armada M700-124898-052
    Armada M700-124898-062Armada M700-124898-072
    Armada M700-124898-082Armada M700-124898-092
    Armada M700-124898-102Armada M700-124898-112
    Armada M700-124898-122Armada M700-124898-132
    Armada M700-124898-162Armada M700-124898-182
    Armada M700-124898-202Armada M700-124898-292
    Armada M700-124898-332Armada M700-124898-372
    Armada M700-124898-392Armada M700-124898-AD2
    Armada M700-124898-B92Armada M700-124898-BE2
    Compaq Armada M700-124899 Series
    Armada M700-124899-004Armada M700-124899-014
    Armada M700-124899-034Armada M700-124899-044
    Armada M700-124899-054Armada M700-124899-064
    Armada M700-124899-074Armada M700-124899-084
    Armada M700-124899-094Armada M700-124899-104
    Armada M700-124899-114Armada M700-124899-124
    Armada M700-124899-134Armada M700-124899-164
    Armada M700-124899-204Armada M700-124899-294
    Armada M700-124899-334Armada M700-124899-394
    Armada M700-124899-AK4
    Compaq Armada M700-124938 Series
    Armada M700-124938-006Armada M700-124938-066
    Armada M700-124938-116Armada M700-124938-166
    Armada M700-124938-186Armada M700-124938-296
    Armada M700-124938-336
    Compaq Armada M700-124939 Series
    Armada M700-124939-002Armada M700-124939-062
    Armada M700-124939-112Armada M700-124939-182
    Armada M700-124939-332
    Compaq Armada M700-124940 Series
    Armada M700-124940-014Armada M700-124940-034
    Armada M700-124940-044Armada M700-124940-054
    Armada M700-124940-064Armada M700-124940-074
    Armada M700-124940-084Armada M700-124940-094
    Armada M700-124940-104Armada M700-124940-114
    Armada M700-124940-124Armada M700-124940-134
    Armada M700-124940-164Armada M700-124940-204
    Armada M700-124940-334Armada M700-124940-394
    Armada M700-124940-AK4
    Compaq Armada M700-124941 Series
    Armada M700-124941-006Armada M700-124941-066
    Armada M700-124941-116Armada M700-124941-186
    Armada M700-124941-336
    Compaq Armada M700-139114 Series
    Armada M700-139114-002Armada M700-139114-004
    Armada M700-139114-022Armada M700-139114-026
    Armada M700-139114-372Armada M700-139114-374
    Armada M700-139114-376Armada M700-139114-BM2
    Armada M700-139114-BM6Armada M700-139114-BN2
    Armada M700-139114-BN6Armada M700-139114-BP2
    Armada M700-139114-BP6Armada M700-139114-BR2
    Armada M700-139114-BR6Armada M700-139114-C62
    Armada M700-139114-C66
    Compaq Armada M700-139116 Series
    Armada M700-139116-002Armada M700-139116-003
    Armada M700-139116-004Armada M700-139116-006
    Armada M700-139116-012Armada M700-139116-016
    Armada M700-139116-032Armada M700-139116-036
    Armada M700-139116-042Armada M700-139116-046
    Armada M700-139116-052Armada M700-139116-056
    Armada M700-139116-072Armada M700-139116-076
    Armada M700-139116-082Armada M700-139116-086
    Armada M700-139116-092Armada M700-139116-096
    Armada M700-139116-102Armada M700-139116-106
    Armada M700-139116-122Armada M700-139116-126
    Armada M700-139116-132Armada M700-139116-136
    Armada M700-139116-162Armada M700-139116-166
    Armada M700-139116-182Armada M700-139116-186
    Armada M700-139116-202Armada M700-139116-206
    Armada M700-139116-292Armada M700-139116-296
    Armada M700-139116-372Armada M700-139116-374
    Armada M700-139116-376Armada M700-139116-392
    Armada M700-139116-396Armada M700-139116-AA2
    Armada M700-139116-AA4Armada M700-139116-AA6
    Armada M700-139116-AB2Armada M700-139116-AB4
    Armada M700-139116-AB6Armada M700-139116-AC2
    Armada M700-139116-AC4Armada M700-139116-AC6
    Armada M700-139116-AD2Armada M700-139116-AD4
    Armada M700-139116-AD6Armada M700-139116-AK2
    Armada M700-139116-AK6Armada M700-139116-B92
    Armada M700-139116-B96Armada M700-139116-BE2
    Armada M700-139116-BE6Armada M700-139116-BF2
    Armada M700-139116-BF6
    Compaq Armada M700-139117 Series
    Armada M700-139117-002Armada M700-139117-004
    Armada M700-139117-022Armada M700-139117-026
    Armada M700-139117-372Armada M700-139117-374
    Armada M700-139117-376Armada M700-139117-BM2
    Armada M700-139117-BM6Armada M700-139117-BN2
    Armada M700-139117-BN6Armada M700-139117-BP2
    Armada M700-139117-BP6Armada M700-139117-BR2
    Armada M700-139117-BR6Armada M700-139117-C62
    Armada M700-139117-C66
    Compaq Armada M700-139120 Series
    Armada M700-139120-002Armada M700-139120-004
    Armada M700-139120-006Armada M700-139120-008
    Armada M700-139120-012Armada M700-139120-016
    Armada M700-139120-032Armada M700-139120-036
    Armada M700-139120-042Armada M700-139120-046
    Armada M700-139120-052Armada M700-139120-056
    Armada M700-139120-072Armada M700-139120-076
    Armada M700-139120-082Armada M700-139120-086
    Armada M700-139120-092Armada M700-139120-096
    Armada M700-139120-102Armada M700-139120-106
    Armada M700-139120-122Armada M700-139120-126
    Armada M700-139120-132Armada M700-139120-136
    Armada M700-139120-162Armada M700-139120-182
    Armada M700-139120-186Armada M700-139120-202
    Armada M700-139120-206Armada M700-139120-292
    Armada M700-139120-296Armada M700-139120-372
    Armada M700-139120-374Armada M700-139120-376
    Armada M700-139120-392Armada M700-139120-396
    Armada M700-139120-AA2Armada M700-139120-AA4
    Armada M700-139120-AA6Armada M700-139120-AB2
    Armada M700-139120-AB4Armada M700-139120-AB6
    Armada M700-139120-AC2Armada M700-139120-AC4
    Armada M700-139120-AC6Armada M700-139120-AD2
    Armada M700-139120-AD4Armada M700-139120-AD6
    Armada M700-139120-AK2Armada M700-139120-AK6
    Armada M700-139120-B92Armada M700-139120-B96
    Armada M700-139120-BE2Armada M700-139120-BE6
    Armada M700-139120-BF2
    Compaq Armada M700-140142 Series
    Armada M700-140142-002Armada M700-140142-004
    Armada M700-140142-006Armada M700-140142-012
    Armada M700-140142-016Armada M700-140142-032
    Armada M700-140142-036Armada M700-140142-042
    Armada M700-140142-046Armada M700-140142-052
    Armada M700-140142-056Armada M700-140142-072
    Armada M700-140142-076Armada M700-140142-082
    Armada M700-140142-086Armada M700-140142-092
    Armada M700-140142-096Armada M700-140142-102
    Armada M700-140142-106Armada M700-140142-122
    Armada M700-140142-126Armada M700-140142-132
    Compaq Prosignia 170 Series
    Compaq Evo N400C Series
    Compaq Evo N410C Series
    Evo N410C-280110-B22Evo N410C-305384-021
    Evo N410C-305385-021Evo N410C-314155-001
    Compaq Evo N410C-470037 Series
    Evo N410C-470037-534Evo N410C-470037-550
    Evo N410C-470037-557Evo N410C-470037-559
    Evo N410C-470037-564Evo N410C-470037-565
    Evo N410C-470037-574Evo N410C-470037-576
    Evo N410C-470037-582Evo N410C-470037-589
    Evo N410C-470037-590Evo N410C-470037-592
    Evo N410C-470037-593Evo N410C-470037-594
    Evo N410C-470037-596Evo N410C-470037-597
    Evo N410C-470037-599Evo N410C-470037-600
    Evo N410C-470037-624Evo N410C-470037-626
    Evo N410C-470037-628Evo N410C-470037-629
    Evo N410C-470037-631Evo N410C-470037-632
    Evo N410C-470037-634Evo N410C-470037-635
    Evo N410C-470037-637Evo N410C-470037-638
    Evo N410C-470037-640Evo N410C-470037-642
    Evo N410C-470037-643Evo N410C-470037-645
    Evo N410C-470037-647Evo N410C-470037-649
    Evo N410C-470037-651Evo N410C-470037-652
    Evo N410C-470037-654Evo N410C-470037-655
    Evo N410C-470037-657Evo N410C-470037-659
    Evo N410C-470037-660Evo N410C-470037-662
    Evo N410C-470037-663Evo N410C-470037-711
    Evo N410C-470037-716Evo N410C-470037-719
    Evo N410C-470037-721Evo N410C-470037-723
    Evo N410C-470037-725Evo N410C-470037-727
    Evo N410C-470037-728Evo N410C-470037-729
    Evo N410C-470037-730Evo N410C-470037-731
    Evo N410C-470037-732Evo N410C-470037-734
    Evo N410C-470037-735Evo N410C-470037-737
    Evo N410C-470037-739Evo N410C-470037-740
    Evo N410C-470037-742Evo N410C-470037-743
    Evo N410C-470037-744Evo N410C-470037-745
    Evo N410C-470037-748Evo N410C-470037-750
    Evo N410C-470037-751Evo N410C-470037-753
    Evo N410C-470037-756Evo N410C-470037-758
    Evo N410C-470037-759Evo N410C-470037-760
    Evo N410C-470037-761Evo N410C-470037-762
    Compaq Evo N410C-470039 Series
    Evo N410C-470039-344Evo N410C-470039-347
    Evo N410C-470039-348Evo N410C-470039-349
    Evo N410C-470039-350Evo N410C-470039-351
    Evo N410C-470039-352Evo N410C-470039-353
    Evo N410C-470039-354Evo N410C-470039-355
    Evo N410C-470039-356Evo N410C-470039-357
    Evo N410C-470039-358Evo N410C-470039-359
    Evo N410C-470039-360Evo N410C-470039-361
    Evo N410C-470039-362Evo N410C-470039-363
    Evo N410C-470039-364Evo N410C-470039-365
    Evo N410C-470039-366Evo N410C-470039-367
    Evo N410C-470039-368Evo N410C-470039-369
    Evo N410C-470039-370Evo N410C-470039-371
    Evo N410C-470039-372Evo N410C-470039-373
    Evo N410C-470039-374Evo N410C-470039-375
    Evo N410C-470039-376Evo N410C-470039-377
    Evo N410C-470039-378Evo N410C-470039-379
    Evo N410C-470039-380Evo N410C-470039-381
    Evo N410C-470039-382Evo N410C-470039-383
    Evo N410C-470039-384Evo N410C-470039-385
    Evo N410C-470039-387Evo N410C-470039-388
    Evo N410C-470039-389Evo N410C-470039-390
    Evo N410C-470039-391Evo N410C-470039-392
    Evo N410C-470039-393Evo N410C-470039-394
    Evo N410C-470039-395Evo N410C-470039-396
    Evo N410C-470039-397Evo N410C-470039-398
    Evo N410C-470039-399Evo N410C-470039-400
    Evo N410C-470039-401Evo N410C-470039-402
    Evo N410C-470039-403Evo N410C-470039-404
    Evo N410C-470039-405Evo N410C-470039-406
    Evo N410C-470039-407Evo N410C-470039-408
    Evo N410C-470039-409Evo N410C-470039-410
    Evo N410C-470039-411Evo N410C-470039-412
    Evo N410C-470039-469Evo N410C-470039-470
    Evo N410C-470039-471Evo N410C-470039-472
    Evo N410C-470039-473Evo N410C-470039-474
    Evo N410C-470039-475Evo N410C-470039-498
    Evo N410C-470039-499Evo N410C-470039-500
    Evo N410C-470039-501Evo N410C-470039-502
    Evo N410C-470039-503Evo N410C-470039-504
    Evo N410C-470039-505Evo N410C-470039-506
    Evo N410C-470039-507Evo N410C-470039-508
    Evo N410C-470039-509Evo N410C-470039-510
    Evo N410C-470039-512Evo N410C-470039-513
    Evo N410C-470039-514Evo N410C-470039-515
    Evo N410C-470039-517Evo N410C-470039-518
    Evo N410C-470039-519Evo N410C-470039-520
    Evo N410C-470039-521Evo N410C-470039-522
    Evo N410C-470039-524Evo N410C-470039-525
    Evo N410C-470039-526Evo N410C-470039-527
    Evo N410C-470039-528Evo N410C-470039-529
    Evo N410C-470039-530Evo N410C-470039-531
    Evo N410C-470039-532Evo N410C-470039-533
    Evo N410C-470039-534Evo N410C-470039-535
    Evo N410C-470039-536Evo N410C-470039-537
    Evo N410C-470039-577Evo N410C-470039-578
    Evo N410C-470039-579Evo N410C-470039-580
    Evo N410C-470039-581Evo N410C-470039-582
    Evo N410C-470039-584Evo N410C-470039-585
    Evo N410C-470039-586Evo N410C-470039-587
    Evo N410C-470039-588Evo N410C-470039-589
    Evo N410C-470039-591Evo N410C-470039-592
    Evo N410C-470039-593Evo N410C-470039-594
    Evo N410C-470039-595Evo N410C-470039-596
    Evo N410C-470039-599Evo N410C-470039-643
    Evo N410C-470039-652Evo N410C-470039-653
    Evo N410C-470039-654Evo N410C-470039-655
    Evo N410C-470039-656Evo N410C-470039-657
    Evo N410C-470039-658Evo N410C-470039-659
    Evo N410C-470039-660Evo N410C-470039-661
    Evo N410C-470039-662Evo N410C-470039-663
    Evo N410C-470039-673Evo N410C-470039-674
    Evo N410C-470039-675Evo N410C-470039-676
    Evo N410C-470039-677Evo N410C-470039-678
    Evo N410C-470039-679Evo N410C-470039-680
    Evo N410C-470039-681Evo N410C-470039-682
    Evo N410C-470039-683Evo N410C-470039-684
    Evo N410C-470039-687Evo N410C-470039-688
    Evo N410C-470039-689Evo N410C-470039-690
    Evo N410C-470039-691Evo N410C-470039-692
    Evo N410C-470039-697Evo N410C-470039-698
    Evo N410C-470039-997
    Compaq Evo N410C-470040 Series
    Evo N410C-470040-006Evo N410C-470040-020
    Evo N410C-470040-044Evo N410C-470040-057
    Evo N410C-470040-058Evo N410C-470040-114
    Evo N410C-470040-115Evo N410C-470040-116
    Evo N410C-470040-117Evo N410C-470040-118
    Evo N410C-470040-119Evo N410C-470040-120
    Evo N410C-470040-121Evo N410C-470040-122
    Evo N410C-470040-123Evo N410C-470040-124
    Evo N410C-470040-125Evo N410C-470040-126
    Evo N410C-470040-127Evo N410C-470040-128
    Evo N410C-470040-129Evo N410C-470040-130
    Evo N410C-470040-131Evo N410C-470040-132
    Evo N410C-470040-133Evo N410C-470040-134
    Evo N410C-470040-135Evo N410C-470040-136
    Evo N410C-470040-137Evo N410C-470040-138
    Evo N410C-470040-139Evo N410C-470040-140
    Evo N410C-470040-148Evo N410C-470040-149
    Evo N410C-470040-150Evo N410C-470040-151
    Evo N410C-470040-152Evo N410C-470040-153
    Evo N410C-470040-154Evo N410C-470040-155
    Evo N410C-470040-156Evo N410C-470040-157
    Evo N410C-470040-158Evo N410C-470040-159
    Evo N410C-470040-160Evo N410C-470040-161
    Evo N410C-470040-162Evo N410C-470040-163
    Evo N410C-470040-164Evo N410C-470040-165
    Evo N410C-470040-166Evo N410C-470040-167
    Evo N410C-470040-168Evo N410C-470040-169
    Evo N410C-470040-170Evo N410C-470040-171
    Evo N410C-470040-172Evo N410C-470040-174
    Evo N410C-470040-175
    NCPQ-COMPAQ-134110-B21 Related List(s)
     COMPAQ Evo N400,N410 / Armada M700 Series, Prosignia 170, Evo N400C,N410C,N410...
    		 4400mAh
    1 to 1 (of 1 items) page  1 
    Q1) What is a COMPAQ 134110 B21 Battery?
    Q2) How many types of batteries are there for the Digital Camera?
    Q3) COMPAQ 134110 B21 Battery Do's !
    Q4) COMPAQ 134110 B21 Battery Don't !
    Q5) What is difference in between rechargeable and non-rechargeable batteries?
    Q6) How can I maximize battery performance?
    Q7) What sort of problems will I have with rechargeable batteries?
    Q8) How are batteries rated?
    Q9) What is the different of Ni-Cd, Ni-MH and Li-ion?
    Q10) What is the "Memory Effect"?
    Q11) What is a battery cycle?
    Q12) COMPAQ 134110 B21 Battery Glossary
    Q13) How can I find the right battery I NEED ?
    Q14) What is COMPAQ 134110 B21 Battery RETURN POLICY AND WARRANTY?

    What is a COMPAQ 134110 B21 Battery?
    COMPAQ 134110 B21 Battery, can be any device that stores energy for later use. The word battery, is limited to an electrochemical device that converts chemical energy into electricity, by use of a galvanic cell. A galvanic cell is a fairly simple device consisting of two electrodes (an anode and a cathode) and an electrolyte solution. Batteries consist of one or more galvanic cells. A battery is an electrical storage device. Batteries do not make electricity, they store it. As chemicals in the battery change, electrical energy is stored or released. In rechargeable batteries this process can be repeated many times. Batteries are not 100% efficient - some energy is lost as heat and chemical reactions when charging and discharging. If you use 1000 watts from a battery, it might take 1200 watts or more to fully recharge it. Slower charging and discharging rates are more efficient. A battery rated at 180 amp-hours over 6 hours might be rated at 220 AH at the 20-hour rate, and 260 AH at the 48-hour rate. Typical efficiency in a lead-acid battery is 85-95%, in alkaline and NiCad battery it is about 65%.
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    How many types of batteries are there for the Digital Camera?
    Two kinds of batteries are widely available: Ni-CD (Nickel Cadmium) and Ni-MH (Nickel-Metal Hydride). There is a third type of rechargeable battery, Lithium Ion, that is becoming increasingly popular.The advantage of a Lithium Ion battery is that it offers better performance than the other two types. The disadvantage is that they do not come in the standard AA battery size, so you can''t use them with most cameras.
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    COMPAQ 134110 B21 Battery Do's !
    1) A new battery comes in a discharged condition and must be charged before use (refer to the devices manual for charging instructions). Upon initial use (or after a prolonged storage period) the battery may require three to four charge/discharge cycles before achieving maximum capacity. 2) When charging the battery for the first time the device may indicate that charging is complete after just 10 or 15 minutes. This is a normal phenomenon with rechargeable batteries. Remove the battery from the device, reinsert it and repeat the charging procedure. 3) It is important to condition (fully discharge and then fully charge) the battery every two to three weeks. Failure to do so may significantly shorten the battery's life (this does not apply to Li-Ion batteries, which do not require conditioning). To discharge, simply run the device under the battery's power until it shuts down or until you get a low battery warning. Then recharge the battery as instructed in the user's manual. 4) If the battery will not be in use for a month or longer, it is recommended that it be removed from the device and stored in a cool, dry, clean place. 5) It is normal for a battery to become warm to the touch during charging and discharging. 6) A charged battery will eventually lose its charge if unused. It may therefore be necessary to recharge the battery after a storage period. 7) The milliamp-hour (mAH) rating of the Hi-Capacityâ„¢ battery will often be higher than the one on the original battery. A higher mAH rating is indicative of a longer lasting (higher capacity) battery and will not cause any incompatibilities. A Hi-Capacityâ„¢ battery will, in most cases, outperform the original by 30% to 50%. 8) Actual battery run-time depends upon the power demands made by the equipment. In the case of notebook computers, screen brightness, the use of the CPU, the hard drive, and other peripherals results in an additional drain upon the battery, effectively reducing the battery's run-time. The total run-time of the battery is also heavily dependent upon the design of the equipment. To ensure maximum performance of the battery, optimize the computer's power management features. Refer to the computer manual for further instructions.
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    COMPAQ 134110 B21 Battery Don't !
    1) Do not short-circuit. A short-circuit may cause severe damage to the battery. 2) Do not drop, hit or otherwise abuse the battery as this may result in the exposure of the cell contents, which are corrosive. 3) Do not expose the battery to moisture or rain. 4) Keep battery away from fire or other sources of extreme heat. Do not incinerate. Exposure of battery to extreme heat may result in an explosion.
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    What is difference in between rechargeable and non-rechargeable batteries?
    Rechargeable batteries perform a little differently than non-rechargeable batteries. The voltage coming from an Alkaline (non-rechargeable) battery decreases steadily as the battery is discharged. Ni-MH and Li-Ion batteries have a lower starting voltage than Alkaline (typically 1.2-1.3V vs. 1.5V for Alkaline), but rechargeables maintain this level until they are almost discharged. One potential problem: the battery life indicator of the camera may be calibrated for alkaline batteries, which could make it somewhat inaccurate.
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    How can I maximize battery performance?
    There are several steps you can take to insure that you get maximum performance from your battery:

    Breaking In New Batteries - new batteries come in a discharged condition and must be fully charged before use. It is recommended that you fully charge and discharge your new battery two to four times to allow it to reach its maximum rated capacity.

    Preventing the Memory Effect - Keep your battery healthy by fully charging and then fully discharging it at least once every two to three weeks. Exceptions to the rule are Li-Ion batteries which do not suffer from the Memory Effect.

    Keep Your Batteries Clean - It''s a good idea to clean dirty battery contacts with a cotton swab and alcohol. This helps maintain a good connection between the battery and your portable device.

    Exercise Your COMPAQ 134110 B21 Battery - Do not leave your battery dormant for long periods of time. We recommend using the battery at least once every two to three weeks. If a battery has not been used for a long period of time, perform the new battery break in procedure described above.

    COMPAQ 134110 B21 Battery Storage - If you don''t plan on using the battery for a month or more, we recommend storing it in a clean, dry, cool place away from heat and metal objects. Ni-Cd, Ni-MH and Li-Ion batteries will self-discharge during storage; remember to break them in before use.

    For Notebook Users - To get maximum performance from your battery, fully optimize the notebook''s power management features prior to use. Power management is a trade off: better power conservation in exchange for lesser computer performance. The power management system conserves battery power by setting the processor to run at a slower speed, dimming the screen, spinning down the hard drive when it''s not in use and causing the machine to go into sleep mode when inactive. Your notebook user''s guide will provide information relating to specific power management features.
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    What sort of problems will I have with rechargeable batteries?
    Rechargeable batteries lose their charge sitting in the camera. Ni-MH batteries lose between 1% - 4% of their charge a day. Since many cameras start reporting a low battery at 80% of full charge, the batteries could be reported low in as little as ten days. This number will vary greatly depending upon the age of the battery, temperature, and camera.

    Memory effect was a problem with older Ni-Cd batteries. This problem has been reduced with newer batteries and chargers, though how you use your batteries may also impact performance. Ni-MH batteries do not have this problem, nor do the Li-Ion batteries.
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    How are batteries rated?
    There are two ratings on every battery: volts and milliamp-hour (mAh). The voltage of the new battery should always match the voltage of your original. Some of our batteries will have higher amp ratings than the original battery found in your device. This is indicative of a longer run-time (higher capacity) and will not cause any incompatibilities.

    Remember: in some cases, the voltage will differ from the original battery. This often happens when both a Li-Ion battery and a Ni-Mh battery are available for the laptop.
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    What is the different of Ni-Cd, Ni-MH and Li-ion?
    Batteries in portable consumer devices (laptops and notebooks, camcorders, digital camera, etc.) are principally made using either Nickel Cadmium (Ni-Cd), Nickel Metal Hydride (Ni-MH) or Lithium Ion (Li-ion) technologies. Each type of rechargeable battery technology has its own unique characteristics:

    Ni-Cd and Ni-MH: the main difference between the two is the fact that Ni-MH batteries (the newer of the two technologies) offer higher energy densities than NiCads. In other words, pound for pound, Ni-MH delivers approximately 100% more capacity than its Ni-Cd counterpart. What this translates into is increased run-time from the battery with no additional bulk to weigh down your portable device.
    Ni-MH also offers another major advantage: NiCad batteries tend to suffer from what is called the "Memory Effect". Ni-MH batteries are less prone to develop this dreaded affliction and thus require less maintenance and care. Ni-MH batteries are also more environmentally friendly than their Ni-Cd counterparts, since they do not contain heavy metals (which present serious landfill problems).

    Li-ion has quickly become the emerging standard for portable power in consumer devices. Li-ion batteries produce the same energy as Ni-MH batteries but weigh approximately 35% less. This is crucial in applications such as camcorders or notebook computers, where the battery makes up a significant portion of the device''''s weight. Another reason Li-ion batteries have become so popular is that they do not suffer from the memory effect AT ALL. They are also better for the environment because they don''''t contain toxic materials such as Cadmium or Mercury.
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    What is the "Memory Effect"?
    NiCad batteries, and to a lesser extent NiMH batteries, suffer from what's called the "memory effect". What this means is that if a battery is repeatedly only partially discharged before recharging, the battery "forgets" that it has the capacity to further discharge all the way down. To illustrate: If you, on a regular basis, fully charge your battery and then use only 50% of its capacity before the next recharge, eventually the battery will become unaware of its extra 50% capacity which has remained unused. The battery will remain functional, but only at 50% of its original capacity. The way to avoid the dreaded "memory effect" is to fully cycle (fully charge and then fully discharge) the battery at least once every two to three weeks. Batteries can be discharged by unplugging the device's AC adapter and letting the device run on the battery until it ceases to function. This will insure your battery remains healthy.
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    What is a battery cycle?
    Cycle life is measured by the amount of times a battery may be charged and discharged. Every time a battery is charged and discharged, it uses one cycle. Cycle life is very important in battery applications such as laptop batteries and emergency light batteries. A NiCad battery has a cycle life of 500-1000 or more cycles.
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    COMPAQ 134110 B21 Battery Glossary
    # COMPAQ 134110 B21 Battery: Two or more cells connected together

    # Cell: An electrochemical system that converts chemical energy into electrical energy.

    # Capacity: This is amount of energy a battery cell or battery pack actually provides. The higher the capacity the longer the equipment will run on battery power. Usually measured in Amp hours (Ah) or Milliamp hours (mAh).

    # battery Charge:This is the process of passing electricity into the battery pack so the pack can be used to provide power when the user is away from mains power

    # Li-ion :Lithium Ion. This is one the newest battery types available. It can offer the same power as a NiMH battery in a smaller lighter package. This type does not suffer from 'Memory Effect' but it is expensive to manufacture.

    # NiCAD:Nickel Cadmium. This is one of the older battery technologies that are still in use. Usually found only in older equipment or applications that require a high power drain. Very prone to 'Memory Effect'.

    # NiMH :Nickel Metal Hydride. This battery type has virtually replaced the NiCAD batteries. This type offers higher capacities, around 30% more than a NiCAD cell of the same physical size. This type is also reported to suffer less from 'Memory Effect'.

    # COMPAQ 134110 B21 Battery Float Voltage: A unit for measuring electrical pressure. All batteries provide DC (Direct Current) electricity. It is important to ensure that the equipment you are powering is being provided with the correct volt or else damage may occur.
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    How can I find the right battery I NEED ?
    Please check the brand and model number of your machine or your the actual battery, there should be a model number or a part number (P/N) on the battery. With the information, you can find the battery you need by using our search engine. If you still can not find your needing, please send an email to us and you will get back within 12 hours (Monday - Friday).
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    What is COMPAQ 134110 B21 Battery RETURN POLICY AND WARRANTY?
    Non-defective product(s) return: you will be responsible for all the shipping (including the original shipping, handling and return postage), and 15% restocking fee will be charged. Defective product(s) return: If products do not work properly, please contact our customer service department first to resolve your problem. All return must have a RMA number, please contact us to get it at first. All our products will be provided full 12 months warranty!
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