Love making use of used vape batteries, not pretty but here is a decent 12V battery pack with battery manegement. Rechargeable key fob using old vape batteries Small powerbank from Vape batteries Recycling your old vapes properly helps to prevent fires. Councillor Joshua Roberts, our cabinet member for Rural Affairs, Environment and Communities, is urging residents to bring used vapes to their local Reusing Disposable Vape Batteries Becky Stern Vape Batteries: Care and Recycling Explained