Cyberpower 425VA UPS repair with modification

[@dorkultra]

Awesome, you just saved me like $50. really appreciate the tutorial!

[@askquestionstrythings]

You are welcome.

[@txcrude]

If you Google Leoch CPS3.6-12(12V 2.9AH) you will replacement batteries on Amazon, eBay and other sellers. No need to cut the plastic. However, I wonder if you could get more time our of it by going to a bigger battery such as a CPS5.5-12 - 12V 5.5AH, which may require some case modification. If you look on the back of the case they list multiple models besides the CP425, such as the CP500. CP550 and CP625 which leds me to believe they are using the same case for all these models.

[@txcrude]

What size torx screw driver do you need? It would have been easier to use a Dremel tool (if you have one).

[@txcrude]

Update: T10

[@yewtoobbrute]

How did you determine that the battery is bad

[@sampeando8742]

Usa un multímetro, si la batería muestra menos de 11v y al cargarla no retiene los 12v está descompuesta.

[@blacktop001]

Just a quick question: I have exact same UPS. Died a couple of days ago (no outage or mains flicker). I suspect the battery is now completely dead. The UPS will not power on or give any indication that it will flash up if I put in a new battery. Was yours in that state before you did your battery swap-out? (Trying to determine if I might have a circuit board issue). thanks... good video

[@askquestionstrythings]

My UPS was constantly beeping like when the power goes out. That nonstop beeping is a sign that the battery is bad. No power can also be a sign that the battery is bad. I understand that cyberpower tech support will help diagnosis the issue to help confirm bad battery conditions.

[@blacktop001]

Okay, thanks for that. I had it do that beeping previously during outages as they wore on. I don't recall anything like that this time though. Maybe i have bigger issues. Looks like more investigating required before battery replacement is considered. Thank so much for getting back to me.

[@askquestionstrythings]

You are welcome. Good luck with things.

[@FuncleChuck]

Interesting. I'm surprised you couldn't find a replacement for the old battery. The new one is technically lower capacity too, 3.3Ah vs the old 3.6Ah, not that it matters.

[@askquestionstrythings]

The new battery was all that was available from my local battery retailer. Looks like a couple of online retailers do carry the original battery. I agree the 3.3Ah vs 3.6Ah isn't going to matter, especially for the application I'm using it in for router backup power. Thanks for watching.

[@bradkendzora2170]

Was anyone able to find a battery that fit without cutting the plastic?

[@askquestionstrythings]

Someone pointed out that there are a couple of suppliers online who still sells the original cps 3.6-12 battery. Quick search and it looks battery mart may carry the original battery. I went to a local battery shop and they did not carry an equivalent which was the same size as the original. Seems online is the only way to find the original battery.

[@bradkendzora2170]

@@askquestionstrythings Thanks, it looks like Battery Mart does have it but the one for $33 plus shipping, close the price of buying a new UPS. The one you used can be had to less so I'll try the modification. Thanks for the help.