Review on Tenergy Charger Rechargeable Batteries Detector by Katie Garcia

Works but not as well as stated on the case. It takes AT LEAST 8 hours to charge even a single 9 volt battery, not 1.8 hours which is difficult for those who rely on a TENS unit to feel comfortable. As I've tried using it for a week I'm not sure I can return it but I'll try and meanwhile I ordered a larger one last night from a company that only deals in batteries and chargers concerned and is a different brand. If I were you, I would go shopping.