TL;DR Where is the RTC/CMOS battery of the Acer Aspire 1410 located?
I have an old Acer Aspire 1410 which I want to use (Don't ask why :) ). The problem is that it throws an error when started only on battery. In fact two errors - 251 and 271. If one make changes in the BIOS, everything is OK. Unfortunately the problem arise again on next boot on battery power. The model is exactly like this - https://www.ifixit.com/Guide/Acer+Aspire+1410+Disassembly/9199 Pictures of the disassembled laptop - https://imgbox.com/gallery/edit/XL7iO5OJhP/wpyCC83ncniLTtIu