* Special adapter to prevent lose any data from replacing car battery
* Connect this adapter from battery 9v dry battery or 12v battery to
    obd ii plug for continue power supply
* 2 leds to show, if the battery with enough power
* Application: vehicles equipped with obd ii connector
* Functions: led display, disconnected protection, low battery capacity alarm
* Instruction:
    1 remove the key
    2 connect power backup to the obdii connector on the vehicle
    3 go step 4 after first green light. It is bad connection or unavailable detection when you
     cant' see the first green light
    4 connect spare power (9v or 12v battery are both available)
     12v battery is recommended
    5 make sure there are 2 green lights, the red light means
     the capacity of spare power is not enough, close all doors,
     replace the battery