Our USB chargers are rated at true charging current. True charging current means that the charger can output the rated current for an indefinite period of time. The  dual USB charger are available in charging currents of 2.1 amps, 3.1 amps, 4.2 amps and 4.8 amps ( 5.0 amps peak). Many of our chargers are low power with no  LED for reduced power consumption when not in use. All of our USB charger sockets have waterproof tight fitting caps. The chargers can operate at 12 / 24 volts DC. USB chargers can be panel mounted or in free standing enclosure mounts or handlebar mounts.