AC Doctor INC 5200mAh Battery for Dell Latitude E6400 E6410 E6500 E6510 Precision M2400 M4400 M4500 M6500 Laptop Battry Replacement 4M529 KY265 PT434 312-0749

Fit laptop models: Dell Latitude E6400, Latitude E6400 ATG, Latitude E6400 XFR, Latitude E6410, Latitude E6410 ATG, Precision M2400, Precision M4400 Answered Question 1. How to use a new battery? Generally, new battery charges three or five times to active its electric performance. 2. 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. 3. If battery is not charging or not recognize. please try the following way removed the new battery, and put the old one back in, then "Click start on the lower left corner of your-screen Under the "search" type in "device" Now it will bring up a few options, please select the "Device Manager" Double click on "batteries" to bring up two more sub categories. Right Click on "Microsoft ACPI Compliant control Method Battery" and click on "Uninstall" ***Important***Now, in the device manager, click "action" then select "scan for handware changes" After that, removed the old battery and put the new one back in, turn the computer on without the ac adaptor inserted (thereby starting on battery). then plug in the adaptor to see if it charges the battery or not.