The Efest Mega USB Charger supports various battery types for electronic devices, including Li-ion and NiMH/NiCd batteries. It automatically detects battery chemistry, adjusting the charging current between 0.5A and 1A for safe charging. Compatible with 18650, 18350, 26650, 20700, 21700, and NiMH/NiCd types like AAA, AAAA, AA, C, SC, and F4.

This charger can simultaneously charge two different batteries and reactivate a completely discharged battery with a 0V charge. It connects via micro USB and can be powered by any 5V or 2A source. Constructed from ABS materials, it is lightweight and portable, featuring an LED screen that displays battery chemistry and charging level.

No batteries are included. The package contains the charger, a micro USB cable, and a user manual. Misusing lithium-ion batteries can pose serious risks and should not be used outside a fully protected battery pack.