| Name | Operating System | Version | Released | Download |
|---|---|---|---|---|
| Battery Firmware Upgrade 48whbattery.exe 2.51MB | Windows 8 32bit, Windows 8 64bit, Windows 7 32bit, Windows 7 64bit | 1.0 | 23 May 2013 | Download |
- IdeaPad P400 Touch, P500, Z400, Z400 Touch, Z500, Z500 Touch produced before
- Windows 8 (32-bit, 64-bit)
- Windows 7 (32-bit, 64-bit)
Z&P400/500 series battery may suddenly stop charging or discharge. Once in this state, unplugging adapter will cause system to power off immediately. This issue can be resolved by upgrading the
Lenovo