Features: Brand new and high quality. It can hold 10 x 18650 lithium-ion batteries. This is a plastic case only; batteries are not included. If refurbishing old batteries, test the voltage of each battery. If voltages differ, charge each battery to the same voltage level. Ensure all batteries have the same voltage before connecting or soldering the PCB. This product is a battery holder case only, no batteries included. Suitable for DIY 18V lithium-ion battery projects. Customers should have basic knowledge of battery assembly. The case is provided for your DIY needs. If you do not have sufficient assembly experience, please do not purchase. Please be aware before ordering. Specifications: Material: ABS Net Weight: 180g Note: Please allow 1mm error due to manual measurement. Due to differences in monitor displays, the image may not reflect the actual color of the item. Package Includes: 1 x Li-ion Battery Case