With mature technology and excellent r&d team, hipower brand is the top 3 in lifepo4 battery in china. Our electric bicycles are all powered by our own battery. Our lifepo4 battery has following features. 1. Light weight, small size, high energy density 2, long lifecycle (4-7 times than lead-acid battery), no memory effect. Can fast charging 3. Maintenance free, chemically stable. It won't explode, no fire and smoke Good performance in low/high temperature ( -20,---75,) 4. No toxicity, no heavy metal lead pollution.