ELECTRIC BIKERS USING TWO BATTERIES or PARALLEL BATTERY CONVERTERS

I’m thinking about this upgrade. Please respond with your experience or expertise?

Is it safe? Does it work well? What’s your voltage and total range? Who is your electric bike vendor? Etc….here are two examples:

eParallel Battery Converter (Bolton Bikes/Area 13)

Parallel Battery Converter for up to three batteries (Big Game Bike...

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Permalink Reply by Mike Schwab on September 29, 2022 at 1:51pm

Parallel is safe. The resistance of the bicycle motor is the same. The resistance of the battery is reduced by half. The total resistance of the motor / battery circuit should only be reduced by a small amount. The current used from each battery should be slightly higher than half of what it was. By using both at the same time the batteries balance each other and the reduced current means you use slightly less current against battery resistance so you get slightly more mileage than using one battery then the other.