Keep your dog training equipment powered up with this reliable 3.7V Li-Polymer battery. With a capacity of 300mAh, this compact powerhouse weighs just 0.23 oz and measures 1.19 x 0.72 x 0.28 inches. The battery is compatible with a wide range of receivers including ET-300, ET-302, EZ-900 series, PE-900 series, and RX-090, as well as transmitters like ET-300, ME-300, and 300TS. This black battery replacement fits multiple part numbers including PL-711828, PL-711828N, BL-100, BP-504, and BP37TR. The lightweight design ensures your dog's comfort while maintaining the functionality of your training collar. Perfect for pet owners looking to maintain their training equipment with a dependable power source.