Tmboryuu 4 Cell 18650 Battery Holder Storage Box Sleeve Without Welding Required for Series Parallel Including Features Solder Slot

Flexible series parallel configuration: You can choose series ( increase voltages) or parallel ( increase capacity) according to your needs, and flexibly respond to different application scenarios Without welding design: Users do not need any welding skills, just insert the 18650 battery with the correct polarity, saving time and effort protections function: Built in multiple protections designs to overcharging, overdischarging, and shortcircuits, ensuring during use Wide compatibility: Suitable for standard 18650 batteries, can be used with various electronic devices to meet different needs such as home, outdoor, laboratory and more : The battery box is made from and metal to ensuring durability and good conductivity, ensuring the normal operate of the battery