Features:
3 independent battery slots, charge up to 3 * 18650 rechargeable batteries independently or simultaneously. (batteries not included.)
Dual USB (Universal Serial Bus) output interfaces, can be backup for 2 digital devices at the same time if battery is inserted.
Built-in protective IC, protect your batteries away from overcharge protection, short circuit protection, etc.
LCD screen, display batteries status, voltage & current flow.
Sliding cover design, batteries can be taken out conveniently. (Battery not included.)
Turn off automatically in 10s if no operation, save power.