Please ensure the product(s) that you are going to buy fits the brand, model and part number of your device.

Specifications:

Battery Type: Li-ion
Color:  Dark Grey
Dimension:  8.09" x 2.05" x 0.82"
Capacity:  8800mAh
Volt:  10.8V
Replace battery part number: 
411462-141 411462-251
411462-261 411462-361
411462-321 411462-421
411462-442 411463-141
411464-141 417066-001
417067-001 432306-001
432307-001 EV088AA
EV089AA HSTNN-IB31
HSTNN-IB32 HSTNN-LB31
HSTNN-Q21C HSTNN-W20C
HSTNN-DB32
HSTNN-DB31
HSTNN-OB31
This battery is also compatible with the following models : 
Original Compaq Presario V3000 Series LI-ION
Replacement Laptop Battery (6 Cell):

Compaq Presario V3000, V3000t, V3000z CTO Series:
V3000 CTO, V3000t CTO, V3000z CTO, V3020CA, V3010,
V3010CA, V3010US, V3015, V3015NR, V3016, V3016US,
V3019, V3019US, V3030, V3030CA, V3030US Series

Original Compaq Presario V6000 Series LI-ION
Replacement Laptop Battery (6 Cell):

Compaq Presario V6000, V6000t, V6000z CTO Series:
V6000 CTO, V6000z CTO, V6000t CTO, V6030, V6030US,
V6048, V6048CL, V6101, V6101US, V6105, V6105NR,
V6107, V6107US, V6110, V6110CA, V6110US, V6120,
V6120CA, V6120US, V6130, V6130US, V6143, V6143CL,
V6137, V6137US, V6133, V6133CA, V6133CL Series

Original HP Pavilion DV2000, DV2000t, DV2000z CTO Series LI-ION
Replacement Laptop Battery (6 Cell):

HP Pavilion DV2000, DV2000t, DV2000z, DV2100 CTO Series:
DV2000, DV2015, DV2015NR, DV2020, DV2020US,
DV2020CA, DV2025, DV2025NR, DV2035, DV2035US,
DV2037, DV2037US, DV2040, DV2040US, DV2040CA,
DV2047, DV2047CL, DV2050, DV2050US, DV2100,
DV2116, DV2116WM, DV2120, DV2120US, DV2120CA,
DV2125, DV2125NR, DV2130, DV2130US, DV2171,
DV2171CL, DV2171CA, DV2174, DV2174CL.

Original HP Pavilion DV6000, DV6000t, DV6000z, DV6100 CTO Series LI-ION
Replacement Laptop Battery (6 Cell):

HP Pavilion DV6000, DV6000t, DV6000z, DV6100 CTO Series:
DV6000, DV6040, DV6040US, DV6040CA, DV6045,
DV6045NR, DV6058, DV6058CL, DV6100 CTO, DV6103,
DV6103NR, DV6105, DV6105US, DV6105CA, DV6107,
DV6107US, DV6108, DV6108NR, DV6109, DV6109OM,
DV6110, DV6110US, DV6110CA, DV6119, DV6119US,
DV6120, DV6120US, DV6120CA, DV6128, DV6128OD,
DV6130, DV6130US, DV6130CA, DV6131, DV6131OD,
DV6135, DV6135CA, DV6135NR, DV6140, DV6140US,
DV6140CA, DV6149, DV6149US, DV6150, DV6150US,
DV6165, DV6165CL, DV6171, DV6171CL, DV6174,
DV6174CL, DV6174CA.

laptop batteries have two main ratings on them: Volts and Amperes. Because size and weight of laptop batteries is limited when compared to larger batteries such as car batteries, most companies show their ratings with Volts and Milliamperes. One thousand Milliamperes equals 1 Ampere. When buying a battery, select batteries with the most Milliamperes (or mAh). Batteries are also rated by Watt-Hours, perhaps the simplest rating of all. This is found by multiplying the Volts and the Amperes together. For example:

14.4 Volts, 4000mAh (Note: 4000mAh is equal to 4.0 Amperes).

14.4 x 4.0 = 57.60 Watt-Hours

Watt-Hours signifies the energy needed to power one watt for one hour. This laptop battery can power 57.60 watts for one hour. If your laptop runs at 20.50 watts, as an example, this laptop battery could power your laptop for 2.8 hours.

There are several steps you can take to help you get maximum performance from your laptop battery:

Prevent the Memory Effect - Keep the laptop 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 the laptop 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 the portable device.

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

Battery Storage - If you don’t plan on using the laptop battery for a month or more, store it in a clean, dry, cool place away from heat and metal objects. NiCad, NiMH and Li-Ion batteries will self-discharge during storage; remember to recharge the batteries before use.

Upgrade my 12cell HP Pavilion dv6500/CT dv6500t dv6500z dv6700/CT battery from NiMH to Li-Ion

NiCad, NiMH and Li-Ion laptop batteries are all fundamentally different from one another and cannot be substituted unless the laptop has been pre-configured from the manufacturer to accept more than one type of battery chemistry. Please refer to your manual to find out which rechargeable battery types the laptop device supports or use our Battery Finder above to find all the compatible laptop batteries for your device. It will automatically list all of the battery chemistries supported by your specific device. If your device does allow you to upgrade the battery from NiMH to Li-Ion, you will typically get longer run times.

For example, if your laptop uses a NI-MH battery that is 9.6 Volts, 4000mAh and the new li-ion laptop battery is 14.4 Volt, 3600mAh, then you will obtain longer run time with the li-ion battery.

Example.

Li-Ion: 14.4 Volts x 3.6 Amperes = 51.84 Watt Hours
Ni-MH: 9.6 Volts x 4 Amperes = 38.4 Watt Hours
The Li-Ion is stronger and has longer run time.