Replacing CMOS battery in a Sony Vaio PCG-7141M/VGN-NS12M (check polarity!) (NO AUDIO)

Disassembly/reassembly video of Sony Vaio PCG-7141M/VGN-NS12M in order to replace the CMOS battery.
Warning: make sure to check the polarity! On the replacement battery I got, the polarity is reversed compared to the board. If you have the wrong polarity, the CMOS battery will get reverse charged, it won't work, it can damage the new CMOS battery and it could be a safety issue. See 6:35

Видео Replacing CMOS battery in a Sony Vaio PCG-7141M/VGN-NS12M (check polarity!) (NO AUDIO) канала piernov