Revtronic Charger for 18650 Li-on Rechargeable Battery IRC-X1 is a single channel USB smart charger dedicated for 18650,26650,16340,14500,10440 battery etc, features the constant-current charge which extends the lifespan of the battery. Specially designed for flashlight rechargeable batteries, IRC-X1 is more than a charger. It can also be used as a portable power source with a rechargeable battery. With the built-in advanced safety mechanism to extend the battery lifespan and simple, intelligent LED indicator interface, you will be amazed by how useful this little tool can be. The IRC-X1 is a reliable tool when traveling light, especially for outdoor enthusiasts. Size: 86mm (L) x 27mm (W) x 33mm (H)