1. four charging current options (500mA/700ma/1000mA/2000ma) are available, and 2000ma is the fourth slot specified;2. LED shows the charging state of 25%, 50%, 75%, 100%, NIMH type battery 1.2V, Li-fe 3.2V, Li-ion 3.7V/Li-ion 3.85V;3. Li-ion battery and Ni-MH battery can be identified automatically, and Li-po4 battery and Li-ion 3.85V battery can be selected manually;4. with 0V voltage activation function, 1.65-1.85v cannot be charged (but there will be activated current trickle charging);5. There are overcharge, over-discharge, short circuit, inligent identification of bad battery and reverse battery detection protection;6. charging mode, constant current and constant voltage;7. DC input is adopted, and the working power supply of the charger is 5v-2a (micro plug);8. with standard 5V/1000mA USB automatic identification output functionElectrical parameters:1. input: Micro USB DC 5V/2A2. output: 1.42V4.2V ± 0.05V,3.65 ± 0.05V4.35 ± 0.05V3. Current: 2000ma * 1 1000mA * 2 700ma * 3 500mA * 44. constant voltage, cut-off current: less than 100mAh5. standby current: less than 15mAh