>>51092576Just about any laptop, even a cheap POS, should feature a circuit that'll cut off power to the battery after it's fully charged, as over-charging a battery can cause it to explode.
What does affect the battery life are the following things, when done for any extended period of time:
1. have the battery be at 100% charge
2. have the battery get hot while charged
3. have the battery be fully discharged
If you keep a battery hot and fully charged all the time, it will lose about 10% of it's total life per year.
