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Upgrade your Stacyc 12eDrive or 16eDrive electric balance bike with this battery adapter, fully compatible with Dewalt 20V batteries. It allows you to replace expensive original batteries with Dewalt 20V packs, significantly extending ride time—ideal for kids' off-road training, outdoor adventures, and long-distance riding. Built from premium PLA material and high-quality electrical components, the adapter features a two-piece design with a bypass module that relocates the battery under the seat for better balance and safety. Installation is fast and tool-free, with mounting screws, a Velcro strap, and clear instructions included. Each kit comes ready to use—just connect and ride. (Battery not included.)