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 tools).  If you are looking for ready to buy 18650 packs with BMS go to Luna Cycle website. Bike builders everywhere are discovering that clustering many 18650s together are an effective way to build not only an affordable pack, but one with unbeatable performance and safety. Note that even though they are safer than soft pouch LiPos (popular with RC enthusiasts), it is still a lithium chemistry, which is always dangerous when mis-handled (fire risk). … Continue reading A Home-Built Ebike Battery Pack from 18650 Cells