18650 Stack
Description
This Is My Idea How To Do Power Bank Inside Bike Seat Tube. This Is Stackable Customizable Module For 18650 Batteries. You Can Use This Springs: Https://Www.Aliexpress.Com/Item/Free-Delivery-100Pcs-18650-Battery-Pack-15-18-14-33-Spring-Contact-Piece-Battery-Box-Positive/32813127196.Html?Spm=2114.13010208.99999999.264.7Kcwbg
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