This is a USB Charger Cable, used for RC 7.2V 250mA Ni-MH Ni-CD Battery. Please Note: Always check the correct Positive/Negative connection between the charger and your batteries, The square hole socket is connected to the positive, and the round hole socket is connected to the negative.

This charger must not be left unmonitored when charging. 
Red color indicator to show the charging state.
Turn on the power, the indicator light keeps on when the load is not connected, showing the normal working status.
During the normal charging process, the indicator light flashes slowly.
When the battery is fully charged, the indicator light automatically goes out.
The indicator light flashes quickly when the battery charging malfunctions.
Fit for car/boat model toys, remote control toys, lighting, security facilities, electric tools etc.
This charger must not be left unmonitored when charging. 
Note: The Red cable of the Battery port corresponding to the white cable of charging port. The Black cable of the Battery port corresponding to the black cable of charging port.

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