Bolayu Universal Dual Battery Charger For 18650 16340 26650 Rechargeable 3.7V Li-ion US Plastic, Metal Imported It can charge 2 batteries at a time. Compact, portable and multi-functional design. Automatically stops when charging has completed. With a LED indicator: red light stands for charging status and green light for fully charged. It's suitable for some cylindrical lithium batteries such as 18650, 14500, 16340, 10440, and 26650.