Amaya One For Four Built-In Power Bank 12000mAh – White. 

• Built-in multiple circuit protection 
• Fire retardant material 
• Over-charge protection
• Over temperature prot
• 3 built in USB cables- lightining, Type-C and micro
• Polymer battery 

• High Capacity of 20000 mAh and 74Wh】High capacity of 20000 mAh; Enough capacity to fully charge four Mi 9 phones and still have power left. Built-in smart USB charging controller. Compatible with most phones and digital devices.
• 【Dual Output & Input More Efficient and Convenient】Redmi Power Bank 20,000mAh has two USB-A output ports and two input ports (a USB-C and a Micro-USB port). Each output port with a maximum output of 18 W when used alone. The combined output of the two ports can reach 5.1 V/3.6 A, so it can be used to charge both phones and tablets.
• 【Advanced Circuit Chips】Added protection and enhanced safety. The high-precision resistance, inductance, and capacitance components and advanced circuit chips can easily tackle overcharging, over-discharging, overheating, short circuits and other faults, offering reliable protection for both the power bank and devices. Multiple protections and enhanced safety for daily use.
• 【High-density Lithium Ion Polymer Battery】The high-density lithium-ion polymer battery provides lasting and reliable battery life for devices such as phones, tablets and digital cameras. So you can recharge wherever you are — in the office or on the go.
• 【What You Get】1* 20,000mAh Redmi Standard Power Bank; 1 * Micro-USB cable; 1 * Instruction manual. Any cable with a Micro-USB or USB-C port can be used for power bank self-charging.