batteries in parallel is the way to go. in series they resistance is additive as is the voltage. as you string them in series your potential (spike voltage VS battery voltage) diminishes, you will often see the first battery charge better than the rest this way. if you diode isolate each one in parallel they will not swap voltage. diode on positive of each battery or else they will bleed voltage since the ground is common to each other. electrically isolate each battery in parallel.
Tom C
Tom C
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