Unhook the battery from the back end of the trimmer. Connect the battery charging station to a standard wall outlet. Make sure the green light illuminates on the charging station.
Insert the battery completely into the charging station. Make sure the red light appears, which lets you know that it’s charging. Wait at least one hour for the battery to fully charge.
Wipe off the positive and negative terminals on the battery and your charging station, if the red and green lights don’t illuminate when they’re plugged in. Try a replacement battery if they still don’t illuminate. If the replacement battery doesn’t work, the charging station may need to be replaced.
Plug the charged battery into the trimmer. Press in the lock button, on the side of the rear handle, and depress the trigger. If the lock button doesn’t work, the head won’t spin, so the lock button will need to be replaced.
Turn the trimmer upside down and unscrew the cover on the head of the trimmer. Take the cover off and the spool out. Check the condition of the cover, the spool and the line. If the cover or spool are broken, the head may not spin. If the line is improperly wound, the head won’t spin and the line won’t come out.