1. let the power of the Nokia BL-L5J batteries (15%) drain to 0% When you use your brand new Battery first time. And then full charge it(usually charge it full 12 hours) and let it drain to 0% again. Do this for 2~3 cycles.
2. If you have a nickel-metal hydride battery, completely drain and recharge the Nokia BL-L5J Cell Phone battery once a month to maximize its capacity to hold a charge.
3. Don’t leave your computer plugged in constantly when it is not in use. If your computer always relies on this power, it will loose its ability to last long on its own. So always charge your computer when the Nokia BL-L5J battery is almost dead and then unplug it from the wall.
4. If you have two or more battery pack of BL-L5J, it’s wise to discharge and then fully charge it on battery power once a week or so, just to keep the battery fresh conditions.
5. Keep it cool. Do not expose the BL-L5J battery to high heat or freezing temperatures. Do not leave your battery in your car in the summer. Hot batteries discharge very quickly, and cold ones can’t create as much power.Overheat is damaging harmful for you Cell Phone battery, so it is wise to remove the Battery from a Cell Phone when it has been fully charged.
6. If you do not use your Nokia Cell Phone for extended periods of time (a week or more), remove the Nokia BL-L5J battery pack from the Cell Phone .

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