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Ricky327 · 11-21-2003, 09:13 PM

I dont know what PSU you are using but a 0.7V drop is enough to make your PC unstable. You might also have problem in getting your backup battery charged up properly.

I posted a "zero voltage drop tank circuit" diagram on some thread some months ago. It should avoid any voltage drop apart from split second where the relay changed over. In that split second the 2 diodes still supply power from both batteries.

11-21-2003, 09:13 PM	#3
Ricky327 Raw Wave Join Date: Jun 2003 Location: London UK Posts: 1,818	I dont know what PSU you are using but a 0.7V drop is enough to make your PC unstable. You might also have problem in getting your backup battery charged up properly. I posted a "zero voltage drop tank circuit" diagram on some thread some months ago. It should avoid any voltage drop apart from split second where the relay changed over. In that split second the 2 diodes still supply power from both batteries.