Do you need to discharge battery on time interval ?

[Anonymous user]

I have BX800CI and BX1100CI.

Do i need to discharge my battery on timely interval ? Say, once a month or once every two months ?

So the battery will always on top condition ?

[BillP · Accepted solution]

Short answer: Nope, you do not.

Long answer: I think you are basically asking how often you should do what we call a "runtime calibration." Essentially, the UPS does a self test (goes on battery for several seconds) every two weeks by default. This tests the battery operation of the UPS periodically against the load you have on the UPS. It also does this when you turn your UPS on if you had turned it off. When you have a power outage or event naturally, the UPS constantly recalculates the available runtime since while it is online it is only a really good estimate. A lead acid battery does not require any extra specific maintenance besides keeping it in a good environment where it is not exposed to lots of heat and keeping it at float voltage.

You can consider doing a runtime calibration if you do not have many power events and your on battery runtime is not being calculated properly in software if you use that, like once a year, or after you replace your UPS batteries. You don't want to do it often because then you'll decrease the lifetime of the battery unnecessarily.