An ultra-fast USB charger will keep your devices powered up while on the water. Jim Hatch Mobile devices and laptops go everywhere and serve us well, even on the water. But once the device’s battery dies, we’re at a loss. An onboard USB-style charger is the answer, and if you’re the antsy type who can’t stand to be without a phone, an ultra-fast charger is even better. We found that it’s easy to install aboard a boat a USB fast-charger such as the Scanstrut Flip Pro SC-USB-F.