Posting to say thank you for the information in this thread.

I have a GS-1500U, which is essentially a rebadged CyberPower 1500AVR that was sold by BestBuy under the Geek Squad brand quite a few years ago. I've gone through at least 2 sets of batteries in it over the years and most recently it wouldn't charge the batteries anymore. I charged the batteries with my Noco Genius 10 and put them back in but within a few days the batteries were dead and the unit would loose power at times (completely powered off). I tried fresh batteries and had the same experience.

I came...

Registered to thank a thread/post for posting information on how to fix my UPS (battery backup).

[url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-power-supplies-and-power-supply-design/76774-cyberpower-1500avr-not-charging[/url]https://Registered to thank a thread...charging[/url]