Kingzarkon
Posts: 2
Joined: Wed Jul 01, 2020 9:24 am

Rapid battery loss / gain 75 to 65%

Wed Jul 01, 2020 9:33 am

Hey everyone!

Got a used 2014 i3 rex this week. Loving it so far, but I've noticed a peculiar thing about the battery.

When I first charged it, I took a screenshot in the app for each hour of charging, and noticed a consistent 5% per hour, except an immediate jump from about 68-75 percent, shaving an hour off of the expected charge time. I then noticed an almost immediate drop when driving. Went from 75-65 in two kilometers driving at 65km/h.

Charging again now, and same immediate jump from 68-75%.

Any thoughts?
Cheers

SwissDI3
Posts: 18
Joined: Sun Dec 17, 2017 2:34 am

Re: Rapid battery loss / gain 75 to 65%

Fri Jul 03, 2020 12:10 am

Sudden jumps normally indicate a faulty battery module.
But before you panic, I would run the battery down at least 2-3 times to below 10% and charge it back to 100.
Maybe the Battery management system needs to re-calibrate.

Kingzarkon
Posts: 2
Joined: Wed Jul 01, 2020 9:24 am

Re: Rapid battery loss / gain 75 to 65%

Fri Jul 03, 2020 2:49 pm

OK thanks. I'll keep an eye on it for a few more cycles. I wonder if this is the sort of thing covered under the battery warranty..

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