Solar Universe India Lithium Ferrous Battery (LFP) of 6.4V-6ah for 6V Solar, Electric or Lighting Applications (Retrofit for 6V-4.5ah Battery), 6.4V-6ah LiFePo4 Battery with BMS This is a single unit of 6.4V-6ah (6000mAh) Lithium Ferrous Phosphate Battery with an inbuilt Battery Management System (BMS) which provides it multiple protections as well as ensures enhanced battery performance & life. This type of battery is suitable for Off-Grid Lighting, Solar Kits, Lamps & Home Lighting Systems as well as for General Lighting. One may use it like any other battery but with the advantage of having a lithium-type battery that is portable, durable, easier to install & handle as well as more efficient. It can be charged via 6V solar panels of 5W & above with a charge controller in between. By purchasing charge controllers or regulators, one can use them for off-grid purposes while trekking, camping, or otherwise. If used efficiently & properly, it will deliver up to 1500 cycles during its lifetime.