Since a few days my battery charges only to 74% although it still shows green and charging. But the % does not go higher then 74%. Anyone experienced the same? Anything I can do? I had my battery discharged to 0% just before since yarbo was stuck in the evening and I did not notice. Any advise? Or …

Unplug the battery for 4 hours and it will reset the BMS and report correctly.

There have been other threads requesting this. Anyone with familiarity with Li-Ion batteries and NMC specifically know how bad it is to leave those batteries at 100% for extended periods of time. And if they really are at 4.2v per cell and maintaining a trickle charge, that is extremely concerning. …

Thanks Bryan. That did the trick.

I just had this same issue. Here is the official yarbo support reply if anyone is interested. These steps did reset it to reporting 100%. We have found that the issue with charging is due to the charging coefficient that remains very low and the battery level does not increase despite continuous c…

[image] Robert Glover: And if they really are at 4.2v per cell and maintaining a trickle charge, that is extremely concerning. I’ve measured the pack at 100% reported SOC on the app. The tool used was a Fluke 87 in recent calibration. Output voltage was 42V, and the pack is a 10S or 10 series…

Ouch. :frowning: Not good. Especially when sitting out in the hot summer sun. Ok. Now I’m curious to see what the other robot manufacturers are doing with their batteries. I’ll check my other bots at the stated 100% charge level and report back.

Just look at electric vehicles. Which is now in a mature product design phase, and Yarbo is just a little autonomous EV. They give the user control over the SOC, so that we (not the company) can decide how much battery life we want. All EV let you set the max charge rate from 50-80% or whatever you …

Well this battery issue has come back. My battery won’t fully charge. I’ve already attempted the shut it down and unplug it for a couple of hours process with no luck this time. So its in the middle of a job and won’t charge back to 80% to go back out. Updated my ticket we’ll see what they say this…

Are you using the “No Charge Period”? I thought I read there is a bug in there.

Nope haven’t messed with that at all.

You can lower the threshold for charge to go back out under working preferences or just hit resume

Battery charging only to 74%

Support & Solutions General Issues

w.borhauer December 8, 2025, 1:57pm 19

Try disconnecting the battery from the core unit (drive unit) for 4 hrs. The BMS for the battery needs to reset it’s self

See details on this link

https://forum.yarbo.com/t/yarbo-not-charging-to-100/4400

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Battery charging only to 74%

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