BK650-AS cannot turn on without battery

[Kankoki]

hi all,

i have a BK650-AS model UPS with unknown condition. 

https://www.apc.com/sg/en/product/BK650-AS/apc-backups-650va-tower-230v-4-iec-c13-outlets-user-repla...

tried to install a good condition battery, it seems working well. 

but it doesn't turn on if I remove the battery, just with AC plugged in.

meanwhile my another BK500 can turn on and give red battery replacement indicator when only AC in without battery installed.

is it normal for BK650-AS, or any components on the board broken?

thanks

[Teken · Accepted solution]

This is by design, which impacts several different UPS lines made by APC. This is why its imperative to test and validate how the UPS will operate in a given environment. UPS's that offer *Hot Swap* batteries capability is one indicator that the UPS can turn back on without a battery present.

Lower end APC UPS within different model and production years either had this feature like your older unit or removed this operating behaviour. It should be noted APC isn't the only one who offer UPS's that behave this way. Eaton, Tripp Lite, CyberPower, Vertiz all have models that behave the exact same way.