DIY (semi-manufactured goods, No battery cell!) It can fill 10 pieces of 18650 power Li-ion batteries. But this is plastic shell, there is no battery inside. This product is component without battery 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 Battery Cell !!!!!! Advance notification: (1). To use this product, you need to have some professional knowledge and experience. We do not that you can use it well. (2). It requires you to have assembly tools. If you do not have these tools, please do not place an order! (3). The label and may not be exactly the same as shown and may change with the batch. Please do not mind! Do not purchase if you mind. Preparation before assembly: (1). If a new core is used, please note: a. 18650 power lithium battery core must be b. A group of 5/10 cores must be equipped with resistance and capacitance to make their voltage the same. (2). If the old battery is repaired, please test the voltage at both ends of each cell. If the voltage is different, please charge each cell to the same voltage value. Very important: that the voltage of each cell is the same before welding PCB. Note: 1. there are no batteries in the package !!!!!! 2. If you need batteries, please don't place orders ! 3. If you don't have the knowledge of battery assembly, please don't place an order! Color: Material:ABS Package Contents: 1 * Li-ion Battery Case 1 * PCB Circuit Board(The color is random, and the designation is not accepted) 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.