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I am charging the lower voltage module to bring it closer to the voltage of the second module before hooking the two modules together (in parallel). How closely matched do the modules have to be before paralleling? How much current will flow? How do I think of this flow so I can do the math...

https://www.ebay.com/itm/36v-Customized-10cells-41volts-15Amps-Lithium-Ion-Battery-Charger-4-Volt-Leaf/224134520073?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 Found this charger on Ebay- modified to charge to 41 volts. Great for LGChem 36 volt modules. Comments are welcome- Thanks.

How can I use the alternator output (while driving) to charge the Chevy OEM LG Chem 10s 36v module from Battery Hookup? What devices will up convert the alternator output to the approx 36 volts needed by this lithium battery. Yes- with enough precision to not harm the battery What do I have to...