48-59-1812 M12/M18 dual battery charger

The 48-59-1812 is a dual battery charger for a single M12 and M18 battery manufactured by Milwaukee.

The charger has plug that plugs in an AC outlet.

The charger contains electronics that communicates with the electronics inside the battery to optimize charging speed while limiting the wear on the battery.

It is a sequential charger meaning that when two batteries are inserted only one will be charged at a time. The next one will automatically start when the first one is done charging.

Exterior

The charger has a red plastic housing with sloped front.

The bottom is black with some ventilation slits and two mounts for wall mounting it on screws.

On the left side there is  a receptacle where a M12 battery can be inserted upside down at the back.

On the right side, at the slope on the front there is a receptacle for an M18 battery that can slide in from the top. Behind it are ventilation slits.

On the top, near the back there is a red and green indicator light behind each receptacle. The sticker on the left side explains the meaning of the lights as status indicators:

• Solid red: battery is charging.
• Slow flashing green: battery is over 80% charged
• Solid green: battery is charger.
• Slow flashing red: battery is waiting to be charged when another one is done
• Fast flashing red: battery is too hot or cold, will resume charging when temperature normalizes.
• Flashing red and green: battery is faulty or damaged and will not be charged.

The power cord is permanently attached.