Antwort auf „Ring pro was working. then after about 11 months died completely.”The problem is very simply the internal battery. If you find a 3.7v 200mah battery, you can transplant the battery protection circuit from the old cell to the new one and replace. ANY LiPO cell will work as long as the dimensions are 0.98" x 0.79" x 0.2" (L*W*T), and you transplant the battery circuit from the old one to the new one. There’s a guide right here on iFixit that will assist you in doing this.