【Management of LED Indicators】While charging, the green LED will blinking, and once fully charged, the LED will be solid.
【4 Pack Rechargeable D-Type Batteries】Rechargeable USB D-type lithium batteries, can be reused over 1000 times, saving you a significant amount compared to disposable d batteries.
【USB Rechargeable D Batteries】No 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.
【Rechargeable Lithium D Battery】Lithium d cell rechargeable batteries are mercury, cadmium, and lead-free, saving thousands of alkaline batteries and reducing landfill waste.
【Multiple Safety Protections】Built-in integrated safety circuit to prevent d batteries rechargeable over-discharge/over-charge, automatically stops charging when the battery is full, compliant with CE, ROSH, 2006/66/EC testing.