The LiPo Guard is bag made of special fire-resistant materials that has the ability to contain a lithium polymer battery fire or charging mishap. place your lithium polymer battery inside the LiPo Guard and extend the charging wires through the top flap. Charge the lipo batteries when they're in the LiPo Guard for peace of mind and greater safety. In the case of a lithium polymer battery charging mishap, the LiPo Guard's fire-resistant material mitigates the ferocity of the LiPoly blaze inside and vents the smoke outside the LiPo Guard.