Selmar-turbo-4-battery-charger-instructions -

: If the needle doesn't move left after several hours, the battery may have a shorted cell and cannot hold a full charge.

Connect the Positive (Red) clamp to the positive terminal first. Then, connect the Negative (Black) clamp to the negative terminal or a grounded metal part of the vehicle chassis. selmar-turbo-4-battery-charger-instructions