With this DIY battery charger, you can charge up to 4pcs 18650 rechargeable batteries at the same time and they all can be replaced manually after full charge.  Dual USB output, can be used as a power bank and charge 2 digital devices at one time with battery inside.Features: 4 independent battery slots, charge up to 4 * 18650 rechargeable batteries independently or simultaneously

Dual USB output(1A & 2.1A), can charge 2 digital devices at the same time if batteries are inserted

Built-in protective IC, protect your batteries against overcharge, short circuit etc

LCD screen, display the current status of batteries capacity, voltage and current flow while charging

Sliding cover design, convenient for the taking-out and installing of the batteries

Save power, LCD backlight will automatically turn off without operation in 28s.Specifications: Brand: Soshine Model: E3S Color: Black Case Material: ABS Suitable Battery Type: Lithium-ion 18650 3.7V Battery Only (Battery not included.) Capacity: Maximum 53.28Wh Input: DC 5V / 2.1A Output: DC 5V 1A / 2.1A (Optional) Input USB Type: Micro B USB Energy Loss under Idle Mode: 2.4 mAh / day   Operating Temperature: 0 ~ 40¡ú Item Size: 11.2 * 8.4 * 2.6cm / 4.41 * 3.31 * 1.02in Item Weight:105g / 3.70oz Package Size: 14 * 8.5 * 3cm / 5.51 * 3.35 * 1.18in Package Weight: 136g / 4.80ozNote: Batteries and phone showed in the pictures are not included.Package List: 1 * Charger   1 * Micro USB Cable