USB Charging DesignNo need for a charger or adapter, can be quickly fully charged within 2 hours using a 4 in 1 USB cable, simply plug into a USB port for easy charging.
8 Pack Rechargeable D-Type BatteriesRechargeable USB D-type lithium batteries, can be reused over 1000 times, saving you a significant amount compared to disposable batteries.
LED Indicator ManagementDuring charging, the green LED light will flash, and after full charge, the LED light will remain on.
Multiple Safety ProtectionsBuilt-in integrated safety circuit to prevent battery over-discharge/over-charge, automatically stops charging when the battery is full, compliant with CE, ROSH, 2006/66/EC testing.
Rechargeable Lithium D BatteryLithium D cell rechargeable batteries are mercury, cadmium, and lead-free, saving thousands of alkaline batteries and reducing landfill waste.