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Seguay ES2/ES4 external battery will only charge to 80%


rrolff

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I have a scooter running battery FW of 0.3.0 (according to Seguay app), and main FW V0.5.3.3.  Everything works as it should except the batteries only charge to 79/80%.  I've tried a Ninebot-Flasher app with version 1.4.1 of the BMS, but while that seems to work (it flashes 1%... 2%... 100%), the BMS still says 0.3.0 in the app.  Any help is greatly appreciated!

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  • 4 weeks later...

I'm in the same boat. Recently i bought a spare battery online because my original Segway es1 was dying (2 years of use). The new battery only charges up to 79/80%. I've tried flashing with ninebot-flasher to the newest bms version 1.4.1 it goes through 1% to 100% then says update ok, but the battery on the app remains at 3.0.3. Some information I gathered from different forums is that if the dash or control board is not OEM (Mine is replaced due to overheat) it may not flash the bms firmware correctly. Any help would be appreciated. 

-Ricky

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