With more than 30 year’s development, Changhong pocket type low discharge rate and medium discharge rate Ni-Fe rechargeable batteries are widely applicable as stand by and DC controlling power supply for utility and electricity industries, telecommunication, locomotive, railway, metallurgy, mining industry emergency lighting, UPS, switchgear tripping and closing, etc. In addition, they are also used as storage power supply for wind, solar photovoltaic and other renewable energy application. Changhong pocket type high discharge rate Ni-Fe rechargeable batteries are mainly used as the starting power supply for diesel engine, DC generator and the DC standby power supply for trail transit application.