48-59-1811 M12/M18 dual battery charger

The 48-59-1811 is a dual battery charger for a single M12 and M18 battery manufactured by Milwaukee.

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.

On the left side there is a receptacle where a M12 battery can be inserted upside down. In front of it are ventilation slits.

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.

On the top, near the back there is a red and green indicator light behind each receptacle. The lights act as charging status indicators with the following meanings:

• 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 black power cord is permanently attached.