use a accumulator
How you should use a accumulator of a laptop or notebook?
1. The accumulator should be cool.
2. Avoid frequent total discharges – you should prefer partial discharges.
3. If you want to store the accumulator then charge them 40%
4. If your Laptop/Notebook is always connected to electricity, remove the accumulator from it.
5. All 30 charges you should unload the accumulator completely, so that the eventual inserted “level announcement” can be calibrated new at the accumulator.
6. Non used accumulators loose their capacity with time, too. Decisive for is the date of production of the accumulator.