Digital Camera Travel Wall Charger 18650 3.7v Li-ion Rechargeable Battery This travel charger with dual channels can simultaneously charge 2x lithium-ion 18650 rechargeable batteries. Reliable and safe with overcharge protection, surely it is a great tool for providing power for 18650 rechargeable batteries. Can simultaneously charge two, but also charge a single. The internal IC voltage monitoring, anti-overcharge protection, anti-flip to protect the battery. Input: AC 100V-240V, 50/60Hz, Max.150mA Output: DC 4.2V---600mAh