Fortunately, the battery can cool while on the charger, and once it reaches a safe temperature, should begin to charge automatically --with the blinking green light replacing the solid red one.

If you pop your Milwaukee battery into its charger, and the red and green lights start flashing, that indicates there's a problem. Here's how to fix it.

Fortunately, the battery can cool while on the charger, and once it reaches a safe temperature, should begin to charge automatically –with the blinking green light replacing the solid red one.