This battery is an exact replacement for the IBM 39J5057 laptop battery. This IBM 39J5057 laptop battery equivalent is guaranteed to meet or exceed IBM original specifications. This IBM 2780 39J5555 5580 5708 5780 74Y6773 74Y6870 laptop battery equivalent fits many different make/model combinations - a complete list is below.
Maximize Performance of IBM 39J5057 Laptop Batteries..
let the power of the IBM 39J5057 batteries (15%) drain to 0% When you use your brand new Battery first time. And then full charge it(usually chrage it full 12 hours) and let it drain to 0% again. Do this for 2~3 cycles.
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 IBM 39J5057 is almost dead and then unplug it from the wall.
Keep your notebook in a well ventilated place and keep it cool. Your IBM 39J5057 battery works faster when it is hot because it is creating more energy and is burning out faster.
Do not place battery for IBM 39J5057 notebook in device for a long period of time if device is not being used.
Keep the battery clean. Avoid exposing the battery to extreme heat or cold. Use your IBM 39J5057 notebook battery. If possible, avoid letting your laptop batteries sit dormant for long periods of time.
To cycle your IBM 39J5057, all you need to do is run your battery completely down, letting it shutoff by itself, let it recharge fully without unplugging it, and then it has been conditioned.