Alomejor 18650 Waterproof Batteries Holder Storage Box House Cover 8.4V USB/DC Double Interface for use with Bicycle Bike Lamp LEDs and other electronic digital products
HIGH QUALITY: The batteries holder is waterproof and durable, which can ensure a long time use.
EASY TO USE: This batteries box house can be packed into 4×18650 batteries and combined them to bicycle lights powered.
WITH PHONE CHARGING FUNCTION: With the phone charging function. With a power display function. You can use two or four 18650 lithium battery.