Weltool 18350 Short Body Kit consists of a 18350 Li-Ion battery measuring 39x18mm with an integrated USB-C charging port. The USB-C port is used to charge the battery with a USB-C charging cable, meaning no additional separate charger is required. The Weltool 18350 Short Body Kit is compatible with the Weltool W3 and W3pro LEP lasers. The power supply for the LEP laser unit in this kit is provided by a short 18350 Li-Ion cell, resulting in a significantly more compact and shorter battery tube, making it even smaller and more practical for carrying in a shirt pocket, jacket pocket, or pants. For the W3pro, different battery tubes are available, allowing operation with three battery sizes: 21700, 18650, and 18350. This maintains the long range of the light beam of up to 1200 meters while allowing for a variation and significant reduction in size. Included in the package: Weltool 18350 Li-Ion battery UB18-12 / 1,200mAh protected with micro USB connection, Weltool BB1 Short Body, and TC3 Tail Cap suitable for the Weltool W3 and W3Pro LEP Laser LED, dimensions approximately 70x25x29mm, weight 78 grams.