The Merlin 15 is an ultra-lightweight, rugged 3350mAh power pack for charging smartphones, action cameras, SAT phones, and other 5V devices. The smart charging technology detects when devices are connected, disconnected, or fully charged. Featuring an integrated 100 Lumens torch with SOS settings, the Merlin 15 is waterproof & dustproof to IP65 Rating. What can the Merlin 15 recharge? Smartphone - 1 to 2 times | Sat Phone - 1 time GPS - 1 to 2 times | Action Camera - 2 to 3 times Smartwatch - 14 to 15 times | Headtorch - 1 to 5 times