I think it all depends on the model of your battery. Also, the purpose of using this device is an important factor. Last month I tried to fix the lighting system in my house. Unfortunately, I don't know much about electronics. So I decided to purchase a 5 Modes Vont LED Tactical Flashlight additionally. By the way, I also saw an ad for LED home lighting recently. Has anyone used any of them? I think with a good function, I would not be sorry to spend money. What can you recommend to me?