UPS not charging brand new battery

[Anonymous user]

Hello,

I just pullout an old UPS from the wardrobe.

It's a Back-UPS Office 500 VA, aka BF500U

Upon plugin it, I got a Replace Battery LED flashing. I charged the battery externally and tested it: 8Volt after 24 hours.  So it needed replacement.

I ordered a new battery and put it. I immediately got a Replace Battery too there.

I charged the new battery externally (AGM battery charger, 500ma charging current).  The battery was at 13.2 volts after being charged.

I put back the new battery  back into the UPS. Everything work fine, and I leave the UPS running for it to drain the battery until it report 15% remaining, before putting the power back on for it to recharge the battery,

I come back the next day, and the UPS "Replace battery' is lit again.  I test the battery voltage: 10.2 volt.

The UPS didn't charge the battery, even though it reported doing so in the manager app.

I partially charge the battery until it reach 11.8 volts. I put the battery back in, plug the UPS. Now, it should be charging but when I test the voltage at the battery pole when the UPS is pluged in AC: 11.8 volts.  So, the UPS is NOT sending power to the battery.

Is the UPS only good for the Eco Center at this point? Or is it salvageable?

Thanks,

Philippe

[BillP]

Hi,

Those units were discontinued some time ago. Your best option is to replace the UPS. 

[BillP · Accepted solution]

Maybe the charging board damge, you should change new one.
Phi Trường Automation