Anker Power Bank (PowerCore 20K) One-Stop Charging for Multiple Devices Super Huge Capacity Conveniently power all your essential devices wherever you go thanks to the 20,000mAh battery capacity. Charge an iPhone 15 over 4 times or a Galaxy S23 Ultra more than 3 times. Charge 3 Devices At Once Charge your phone, tablet, and earbuds or Apple Watch simultaneously from one power bank. Designed for Speed 20W fast charging lets you charge an iPhone 13 to 50% in 37 minutes. Superior Safety Anker’s exclusive MultiProtect safety technology provides complete protection for you and your devices.