BionX 48V

The 48V BionX battery is available in a variety of designs and cases with different specs. This is the more common round version that usually sits in the frame. This version is from 2013 used on a Bullitt:

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Warning label in english, german and french. Quick release and locking mechanism. 2 Pin charging ports, lights up when you touch it!

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The bottom with the frame mount. 423Wh was pretty decent back in 2013 when 300Wh was standard. The QC label however tells us it is most likely made in china.

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The hardest part about BionX batteries is opening them since they have large amounts of silicon. And not the nice boob kind but the glue one…

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Opening a BionX battery can be frustrating and can take several hours but we have devised a method loosening the silicon grip in few minutes.

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The BMS. The discharge port has 2 thick wires but also an additional black/red/orange/green meaning you cant replace the BMS. 2 of the wires are most likely for displaying error messages and the other 2 are for anti tampering. Also the charging port has 4 wires but only 2 are for charging, the other 2 are for the built in indicator. The BMS wires most likely have fuses (polyfuses) inside the black heat shrink like we’ve seen in some other batteries. The BMS also has a speaker and a fuse (But how the hell are you supposed to change the fuse when the battery is so difficult to open??).

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They went with 52 samsung ICR18650-22P which where pretty good at the time. This means we can upgrade it to 653Wh giving it a boost of 54% compared to the original 423Wh.