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How to re Rechargeable batteries Intro I may be no scientific expert but this is a summary of what I have learnt about rechargeable batteries in laptops and cell phones etc First use The first time you use a device that has a rechargeable battery make sure you charge it all the way to 100%, and even then if the device tells you it is full charge it for 8 hours at least, and 24 hours is even better Regular use When using the device makes sure that it is used up until it has fully discharged at least once every third time. If you charge when it is not flat over and over again it will develop a "memory" and start having less and less battery life. Extended Life If you want to extend the life, then make sure it goes completely flat every time and charge it fully every time and this will extend the life. I have also heard a myth (not proven) that placing the battery in the freezer once in a while helps. Irregular Charging if you a phone or laptop on charge for too long between run...