Belkin BOOST CHARGE Plus 10K comes with its own integrated cables, so you never have to remember to bring your own again. Charge your smartphones and tablets on-the-go with attached Lightning and USB-C cables and enjoy up to 23W of pass-through charging that lets you charge your device and recharge the power bank at the same time. 10,000 mAh provides up to 31 hours of additional power for an iPhone 12. Works with smartphones, tablets, wireless earphones, and smart watches. Pass-through is supported when power bank is above 25 percent charge. Maximum additional video playback hours calculated by comparing the mAh capacity of this power bank with the maximum video playback hours achievable by the iPhone 12 under normal conditions. Actual results will vary depending on differing factors for individual users.