No need to throw your Rechargeable Fans away when they no longer stay for longer hours without electricity. It is simply due to a worn out battery. This replacement battery will rejuvenate your Rechargeable Fans again. . Now you have gotten one to use. This backup battery is designed to fit most Brand of and Duravolt Fans. It can also be used for Generators, Rechargeable Fans, CCTV Power boxes and any type of product that requires a 12V battery.  Do note that you must be sure your Fan uses this type of battery first before purchasing. and also check terminals are pin type and not the pull type.It is sealed Lead battery and it is never spillable. It has a long life of use and can do over 600 circles.Ensure you check your fan to know the voltage rating. If your fan uses 2 units of a 6 volts battery, you can use one unit of this 12v battery as against 2 of the 6 volts. However, if your Fan is a 6 volts only battery type, this battery will not work. Please don't use.