USB Lithium Battery Charger for 7.4V 1000mA RC Batteries (SM-2P / SM-3P / SM-4P) Key benefits Travel-ready and compact: Lightweight, pocket-sized design makes it easy to carry in a backpack or toolbox so you can recharge batteries wherever you go. Protects battery and device: Built-in Smart IC prevents overcharging, overdischarging and short circuits, reducing risk and extending battery life. Simple state indication: Red/green LED shows charging status and automatically turns off when fully charged to avoid overcharge and save power. Wide compatibility: Specifically supports RC SM-2P, SM-3P, SM-4P and other 7.4V 1000mA lithium batteries used in toys and hobby models. Features and performance USB-powered: Charges from any standard USB power source (power bank, USB wall adapter, car charger) for flexible charging options on the go. Reliable protection system: Smart IC monitoring provides stable charging current and built-in safeguards against common faults. Efficient visual feedback: Red LED indicates charging, green indicates full; LED auto-off minimizes energy use once charging is complete. Compact form factor for convenience: Designed for easy transport without compromising charging performance. Practical use scenarios Field charging for RC hobbyists: Bring the charger and a power bank to the flying field to top up SM-2P / SM-3P / SM-4P batteries between flights. Travel with toy devices: Keep in your luggage to recharge 7.4V 1000mA lithium batteries for toy airplanes and handheld toys while away from home. Quick home prep before play: Plug into a USB wall adapter to quickly and safely charge batteries before a weekend of RC or toy use. How to use Connect the charger to a USB power source, attach the compatible 7.4V 1000mA battery (SM-2P/SM-3P/SM-4P), and monitor the LED—red = charging, green or LED off = fully charged. Compatible models and specification Model compatibility: RC SM-2P, SM-3P, SM-4P Battery type: Lithium battery, 7.4V, 1000 mA Power input: USB This charger provides a compact, safe, and convenient way to keep your 7.4V 1000mA RC and toy batteries charged and ready.