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18650 vs 21700 battery packs.

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  • AZguy
    replied
    My impression of the 21700's is that for a given Li-ion chemistry as a battery they will provide somewhat more energy mass density and a little more energy volumetric density

    They take less intercell wiring but seem to be more expensive and haven't really become all that mainstream.... yet...

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  • AZguy
    commented on 's reply
    Retro isn't new to this and definitely knows about 14s vs. 13s

  • Diggs Ut
    replied
    Careful - A 14s pack requires a 52v charger. You can run a 52v pack in a 48v system but charging them requires different chargers.

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  • Gigi Liu
    replied
    Maybe you can take Gimibattery ( www.gimi-battery.com) into consideration. The battery they have Brand cell as well.

    Leave a comment:


  • Retrorockit
    started a topic 18650 vs 21700 battery packs.

    18650 vs 21700 battery packs.

    My 48V. 17.5Ah 18650 (Panasonic) pack is getting a little old after 3 years. Due to it's size it still has useful range, but it won't really power the 30A. BBSHD at full throttle for very long without falling flat.
    I found a 13s 5P 40A. Panasonic 21700 pack that's more or less the same size physically. 48V. 24 Ah. Probably weighs a bit more.
    18650= 18mm dia.X 65mm long cells
    21700= 21mm dia.X 70mm long cells
    It's from a US Vendor. So I'll see how this works out. It's a bit pricey, but comes with a charger. Since I own 2-48V. bikes a 2nd charger is a good idea for me anyway.
    https://www.eco-ebike.com/collection...-40a-discharge
    Last edited by Retrorockit; 01-04-2022, 07:44 AM. Reason: fixed 14S mistake
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