Getting the best charger capacity: You will generally see a 4 to 5-digit variety, with the letters mAh following it, and that's your to start with massive indicator of how much this charger is good for you. If you are regularly refueling your phone as well as other gadgets, go https://modernsmarthealth.com/product/computers/power-bank/battery-capacity/15001-20000mah/yoobao-m20pro-20000mah-portable-charger-dual-usb-output-input-lightningmircro-input-mobile-phone-external-battery-pack/