Battery For Dell Latitude E6400 E6410 E6500 E6510 Precision M2400 M4400

• Replacement for laptop battery Dell Latitude E6400 E6410 E6500 E6510 
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• Precision M2400 M4400 M4500 M6500 compatible with original battery 
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• part number PT434 PT435 PT436 PT437 KY477 KY265 KY266 KY268 FU268 FU274 FU571 MN632 MP303 MP307 NM631 NM633.

1. How long is the battery life?
In fact, replacement battery life, 12 cells battery standby time is about 4-5 hours, actual use time is 3-4 hours; 8 or 9 cells battery standby time is about 3-4 hours, actual use time is about 2-3 hours; 6 cells battery standby time is about 2-3 hours, actual use time is about 1-2 hours; 4 cells battery standby time is about 1-2 hours, actual use time is about 1hours. The peripheral interface uses more power, etc., use time is different, such as too hot environment, external usb, games, light, music use very power. The actual operation time will depend on how much electricity is required by the device and how you use it.