DIY Mobile Power Supply: Large capacity, 12x18650 batteries (not included), dual USB mobile power supply, can charge 2 devices at the same time. 3pcs input port with fast charging function, any USB cables can charge the mobile power supply. Easy to Use: Small and lightweight design, easy to carry, easy to install and unload, and easy to use. Smart 18650 Battery Charger: Compatible with 18650 flat head lithium battery. Each battery is charged and tested separately. The battery automatically stops charging when it is fully charged. LCD Display: Accurate power display, can master the battery status anytime and anywhere. Portable power supply and rechargeable 18650 battery charger are plugged in at any time and used at any time. The power output adopts USB interface, plug in data cable to realize portability and charging at any time. Wide Purpose: Compatible with all types of mobile phone charging, with quick charging function, a wide range of purpose, this is undoubtedly your necessary gift.