Battery not charging after os installation EVO...

Question

While reinstalling OS in EVO N 160C, the main power through power adapter got disconnected in spite of the warning. Again I tried fresh OS installation. OS was installed without any problem. All the softwares and hardwares are working properly. Battery has the back up for 3 to 4 hours. the same battery is working in other laptop properly. but this laptop it shows only 0%. I think the problem is in laptop only. But laptop detects the battery properly while removing and connecting. Measurment of voltage maty be wrong.
I summarize:
1. battery problem after os installation.
2. Laptop detects the battery but showing only 0%
3. Same battery works in other Laptop of same model well.
4. Suggest me how to carry out the calibration of battery.
5. Pls suggest me if the problem is because of some other reason.
Looking for your reply