Solar Universe India Lithium Ion (Li-Ion) Battery of 11.1V-4000mAh with inbuilt BMS, suitable for 12V Solar Applications, This is a single unit of 11.8V-4ah (4000mAh) Lithium Ion Battery with inbuilt Battery Management System (BMS) which provides it multiple protections as well as ensures enhanced battery performance & life. This type of battery is suitable as a retrofit or replacement for traditional 12V lead acid type batteries used for powering 12V Solar Lanterns, CCTVs, Off-Grid Lighting & Solar Kits and for experiments & science projects 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 12V solar panels of 10W & above with a suitable charge controller in between. By purchasing a charge controller or regulators, one can use it for off-grid purposes while trekking, camping or otherwise. If used efficiently & properly, it will deliver upto 1500 cycles during its lifetime. We recommend Solar Universe India Solar Panels & Charge Controllers for the best performance of this battery.