This model is a solderless mobile power supply (circuit board + shell) non-mobile power supply product, excluding the battery. The battery needs to be purchased by the customer to install 18650 (flat head) to be able to use. Do not put the battery upside down, it will damage the motherboard (the is the positive pole, the spring is the negative pole), please put it correctly, there is no second chance, the shell cannot be disassembled twice, please repair it at one time!Battery model: 18650 (not included) Installable cells: 6 sections Color: White Material: plastic Size: 146 x 77 x 23 mm Package Contents: 2 x Power Bank Case Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.