What battery for a 350W mid-motor

Posted on Wed 8th, November 2017

• #1

user82961

ADVICE NEEDED

Hi my daily commute is a fairly short 16km trip.

I want to know what is the smallest battery I can get away with for my 350W mid-drive motor (15ah TSDZ2 motor)? I have seen a 36v 6.8Ah bottle battery which is a nice compact size but I want to know if this would suffice for my needs? If so what sort of average range do you think i could get? The terrain is fairly flat and I would want to go 15-20mph max. I weight about 100kgs. I may plan to only use the motor one one leg of my commute (8kms).

The other alternative is to get a 36v 10.5ah battery but this is substantially larger and may be far too large for my actual needs.

Any help greatly appreciated

Thanks in advance.
• #2

slothy

The 6.8 Ah battery has 244 Wh, assuming you're running it at 20 km/h for 8km, consuming 350W all the time (which is highly unlikely), you'd be needing around 140 Wh, so if you're only using the motor on one leg of your commute, you should be fine with the smaller battery.
• #3

user82961 in reply to @slothy

thanks for your promt response slothy. The smaller battery should hopefully be fine then. Cheers

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