Samsung's 30Q is a lithium-ion rechargeable battery with highly stable INR (LiNiMnCoO2) chemistry. These are flat topped, unprotected batteries that are typically intended for use in building battery packs for tools. 18650 cells have high energy density with an optimized electrode design, making them ideal for building battery packs. The capacity is 3000mAh, and its Continuous Maximum Charge Current is 15A. This cell is unprotected, and it possesses no protected circuit board (PCB).