Snapping on to your iPhone wall charger (US, EU & UK model), STROM charges along with your iPhone. Remembering to charge another device is a hassle but with STROM this hassle is gone. Its intelligent circuit prioritizes charging your iPhone before its own internal battery. With its 2.1 Amps TurboCharge power output, STROM is specially optimized to super-charge new iPhones faster than your Apple iPhone wall charger. Despite its small size, STROM is equipped with an industry-leading 3400mAH Panasonic battery and can provide up to 160% extra power to your iPhone. It’s eco-friendly, advanced shut-off circuitry means once fully charged, it consumes no “Stand-by Power”, even when left plugged in the outlet. Included with STROM is KEYBLE, the convenient keychain USB charging cable and TIDY, a simple cable clip to keep your regular charging cable organised.With STROM around, you will never worry about running low on battery again. STROM is always charged and ready to power your mobile life.