Review on Tecmate Optimate USB O-105: Dual Output Weatherproof USB Charger with Bike Plug (BMW, Triumph, Ducati Compatible) by Michael Richardson

I use this on a 2014 BMW GS Adventure. Although I've only ridden it twice, it seems to work well. It fits snugly and stays in place on the BMW Accessory Power Port. I have a RAM phone mount and use my iPhone 7+ while driving while running Waze, Sena and GoPro apps. This thing amazingly keeps my phone 100% charged for a whole day. Offroad with this one still installed but I'll try it soon. Would give it 5 stars but I feel like there must be a better way to attach it to the bike.