SWITCH TO RECHARGEABLE: Stop wasting money on standard alkaline D batteries! Switch to our rechargeable lithium batteries for the same great performance. Reuse the batteries repeatedly. Be eco-friendlier and more cost-effective Type C USB CHARGING: Directly plug a Type C USB into the input for quick and easy charging. LED INDICATORS: When charging, the red LED will blinks and will then LED remains on once it is fully charged. Conveniently see the charging status of each battery LARGE CAPACITY: 12000mWh(8000mAh) capacity provides sufficient power for a wide range of products. Perfect for LED candle, flashlight, or table CD and MP3 players, digital camera, children' toys and so on.