The best portable battery with a capacity of 20000 mAh Promate Bolt-20Pro

Technical specifications: Battery capacity: 20000 mAh Battery type: Li Po USB-C input/output port: 5 volts/2 amps Micro USB: 5 volts/2 amps USB-A 1 port: 5 volts/2 amps USB-A 2 port: 5 volts/2 amps USB-C port: 5 volts/2 amps Total output: 5 volts/2 amps Charging time: 5 hours Compatible with all devices that operate with USB-C port and USB port Features of Promate Bolt-20Pro portable battery Large capacity 20000 mAh: provides repeated charging for phones and tablets. USB-C™ input/output port with 10-watt capacity: for fast and safe charging. Dual USB ports: for charging two devices at the same time. Smart LED display: clearly shows remaining charge level. Very slim: compact design for easy carrying and use on the go. Overheat protection: ensures safe and reliable charging of devices. High-efficiency charging: significantly reduces charging time.