This product is component without battery box and core . It is used to repair and assemble batteries pack, only for people who are familiar with battery performance and have practical experience in battery assembly. No Original, new, No Box!!! , NO LED!!! No Battery Cell !!! PCB Functional characteristics: (1) High temperature protection for charging and discharging, low temperature charging protection. (2) Overcurrent detection protection (3) Overcharge detection protection. (4) Overdischarge detection protection. (5) Continuous current of 60A, capable of supporting a maximum current of 100A (6) Battery disconnection protection function. (7) Suitable for chargers. Advance notification(Very Important): (1). To use this product, you need to have some professional knowledge and experience. We do not that you can use it well. (2). You must have 18650 POWER li-ion batteries and the tools such as spot welding machines, soldering irons, multimeters, and suitable chargers, etc. Color: Green Material: PCB Package Contents: 1 * BL1830 Lithium Battery Charging Protection Circuit Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.