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How to rundown lithium battery voltage some?

I am paralleling an external 36v 12ah battery with my 36v 8ah battery on my xiaomi M365 escooter. 

. However the 12ah external battery charged to 42.8 volts and scooter only charged to 42.0 volts. How can I bring down the 12ah battery to 42.0 volts? They need to both be equal voltage

 before I connect/parallel them. Thank you 

4 Answers

Relevance
  • Dan
    Lv 5
    9 months ago

    O.8V after charging is just a small surface charge difference, they are safe to parallel up like that.

  • Anonymous
    9 months ago

    They are both 36V batteries.  You can use them both after charging.

  • ?
    Lv 6
    9 months ago

    Close enough.          

  • Anonymous
    9 months ago

    Wait a hour and check voltage again, it will go down after initial charge- and .8 volts is nominal - no worries.

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