WHAT CAN YOU DO WITH AMPERES + Get the actual charging rate of your battery. + Compare different charging cables + Compare different chargers + Compare different charging sources + Make sure you are using optimal cable and charger for your device - test the charging speeds and use only the best combinations. + Will notify you when your desired battery level is reached by sounding an alarm. Did you get a new cable? Find out its quality and how good is it for charging your device with Amperes! New wall or car charger? Test it's actual output with Amperes!