The battery insulation bag uses environmentally friendly tin-plated film and high-grade fabric on the outside, which is , fireproof, dirt- and safe to lock in temperature. The 93cm extension cable USB interface can be used with a mobile power bank (it is recommended to use a regular power bank with more than 10,000 mAh), and it can also be in the car for more convenience The large-capacity storage design of the insulation bag is suitable for almost all small model aircraft batteries on the market. The high-quality zipper is smooth and easy to use, and can be folded for storage. It does not take up space after folding and is more portable Large capacity and wide application range It could be heated and insulated for all kinds of model aircraft batteries. Large capacity, strong storage Foldable,easy to carry After folding, it is compact and does not take up space, so it is more convenient to carry out It is easy to use and safe Connect the mobile power supply or 5v2A power supply to work normally High temperature is automatic power off, low temperature is automatic heating, high security The discharge performance of the battery could be effectively recovered at low temperature Colour:Black Material:Tinned film Package Contents: 1 x RC Battery Heating Bag 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.