Turbo Levo DIY charger

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Sep 26, 2018
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I need a turbo levo DIY charger. I tried with standard 42v lithium charger and a LM2596 to supply 5v to brown cable inside the battery, but nothing happens.
I tried, first the 5v, then the 41 / 42v and viceversa. I tried with a lab power supply at 41v too.

Any suggestions?
 

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