I pulled a couple 4Ah 3S LiPos from my tricopter’s stash and soldered together a little series adapter to give me an effective 4Ah 6S LiPo pack. The effective range has been cut in half to around 5miles compared to the original 13lb 10Ah SLA pack, but that’s still plenty enough to get someone around a college campus.
Here’s a video of the updated e-bike taking a quick spin around the block: Be sure to continue reading after the break for more info.
The current carrying capacity of these batteries are completely overkill (40-50C). Each one is capable of delivering a constant 160A of current with a maximum burst of 200A. The bike only draws an average maximum of 10A to 13A.
I also put a battery alarm/monitor on one of the packs to ensure I don’t go below their minimum voltage. Otherwise they would loose their capacity quickly over time.
Additionally, for safe and proper charging, I have to remove these LiPo batteries from my bike and put them on my tricopter’s charger since the scooter’s original SLA charger is not designed to charge LiPos. I’m sure it’s possible for one to find a small LiPo charger that can be embedded in the bike though. That would enable the user to charge it simply by plugging it into the wall without hassle.