Here, i share technical solutions that arised during the development of my solar-bike.. There are 18650-cell spot-welding models that are much more robust and reliable than the sunkko 709a, but…they also cost more than $300.. Why buy an expensive electric bicycle lithium battery? you can build your own at home for much cheaper, plus customize it to your exact needs! all you need are a few tools and the desire to do it yourself!.
Editor note: affordable and powerful 18650 battery cells are the hottest thing in the diy electric bike revolution (most well-known from their use in cordless. This welder, thanks to the limit switch, after lowering the upper electrode arm, automatically enables the welding process in a safe and proper way.. Wearethewatt is building a diy lipo battery spot welding project.the construction is very nice. the pcb is very well laid out but of course even with a very heavy copper clad board it would not be able to handle the amount of current he needs..
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