Abstract: A wireless system for monitoring rechargeable and single-use batteries. The wireless system is usable with existing batteries that implement a smart battery standard and/or an analog port. The wireless system may be installed in the battery, in a battery-powered device, in a battery mount plate, in an attachment that connects to an analog port and/or in a battery charging station or charging device. The wireless system transmits the battery's status to a remote user device, which may be a tablet, smartphone or other wireless device. The system allows a user to monitor one or more batteries remotely.