Unplug everything, remove the battery for 30 seconds.
Replace the battery.
Plug the charger into the wall.
Plug the charger into the CR-48.
SLOWLY slide the charger plug out of the CR48 until the orange charge light comes on.
You can the push the charger plug all the way in and leave it to charge.
You may need to slide the charger plug in and out slowly to find the "trigger" sweet spot that begins the charging.