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:  139.00x89.70x23.30 mm
Capacity:  4400.00mAh
Volt:  14.80 V
Replace battery part number: 
Dell
1340Y 1691P
1K500 1X511
2H660 2J245
2M400 312-0009
312-0026 312-0028
312-0041 312-0051
312-009 312-0113
312-0115 312-3250
312-3280 3149C
3H349 3H352
3H625 3K120
5081P 5208U
53977 555TT
5E528 5H980
66912 6H410
6M934 75UYF
77TCJ 7N025
800BTPR 851UY
8C612 8M815
X0316  
310-0113 312-0052 312-0068 312-0522 3208U 66WHR 01J433 07H508
 
This battery is also compatible with the following models : 
Dell
INSPIRON 2500 SERIES INSPIRON 3700 INSPIRON 3800
INSPIRON 4000 INSPIRON 4100 INSPIRON 4150
INSPIRON 8000 INSPIRON 8100 INSPIRON 8200
INSPIRON SMARTSTEP 100N SERIES LATITUDE C500 LATITUDE C510
LATITUDE C540 LATITUDE C600 LATITUDE C610
LATITUDE C640 LATITUDE C800 LATITUDE C810
LATITUDE C840 LATITUDE CPI233ST LATITUDE CPI366
LATITUDE CPIA300ST LATITUDE CPIA366ST LATITUDE CPIA366XT
LATITUDE CPIA400XT LATITUDE CPIA SERIES LATITUDE CPIC333GT
LATITUDE CPIC SERIES LATITUDE CPID233 LATITUDE CPID266XT
LATITUDE CPID300XT LATITUDE CPID SERIES LATITUDE CPIR400GT
LATITUDE CPIR SERIES LATITUDE CPI SERIES LATITUDE CPM166ST
LATITUDE CPM233ST LATITUDE CPM233XT LATITUDE CPM SERIES
LATITUDE CP SERIES LATITUDE CPTC333GT LATITUDE CPTC SERIES
LATITUDE CPT SERIES LATITUDE CPTS SERIES LATITUDE CPTV466GT
LATITUDE CPTV SERIES LATITUDE CPXH 500GT LATITUDE CPXH SERIES
LATITUDE CPXJ650GT LATITUDE CPXJ SERIES LATITUDE CPX SERIES
LATITUDE M40 SERIES LATITUDE M50 SERIES LATITUDE PP01L SERIES
LATITUDE PP01 SERIES LATITUDE PP01X SERIES LATITUDE PPL
LATITUDE PPX PRECISION M40 SERIES PRECISION M50 SERIES
PRECISION WORKSTATION M50 SERIES SMARTSTEP 100N SERIES 
 
 

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 1691P 1K500 5081P 75UYF Latitude CPx CPi 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.