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18650 vs 21700 battery packs.

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  • Retrorockit
    commented on 's reply
    Actually I'm new to battery specs.. It IS a 13S pack. So far I've only used the batteries that came with motor kits. This is my first battery shopping experience. But I'm always up for trying new stuff. I'm sticking with 48V because my TSDZ2 is also 48V. and I don't need more power form the BBSHD.
    My BBSHD had a Reention case, and the TSDZ2 had a Hailong Shark battery. So they didn't swap. Now I'll be Shark on both bikes, so I'll have a 12Ah spare battery for the BBSHD, and 2 chargers so no waiting to charge either bike.I'm excited about the 24Ah capacity. I used to have to choose whether to ride fast, or ride far. Sometimes headwinds made the decision for me. 37% more capacity should eliminate that compromise.

  • 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...

    Leave a comment:


  • 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.

    Leave a comment:


  • 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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