1
Charging Modes
The MB3904 has eight (8) modes. The Lithium and Recover charge modes
require the mode button to be pressed and held for three (3) seconds
to enter the enhanced mode. These “Enhanced” modes require your full
attention before selecting.
NEVER USE RECOVER MODE ON LITHIUM IRON PHOSHATE BATTERIES.
Do not operate the charger until you confirm the appropriate charge mode
for your battery.
Below is a brief description:
IMPORTANT SAFETY INSTRUCTIONS:
12V NORM
For charging 12-volt Flooded, Gel,
Maintenance-Free batteries.
14.5V
3.8A
12-120Ah Batteries
12.8V LITHIUM (Press & Hold Mode)
For charging 12.8-volt lithium iron
phosphate batteries. When selected,
the LED will illuminate.
14.5V
3A
8-50Ah Batteries
12V RECOVER (Press & Hold Mode)
For recovering and repairing and
storing, old, idle, damaged stratified or
sulfated Flooded, Gel, Maintenance-
Free Lead Acid batteries. When
selected, the LED will illuminate.
NEVER USE RECOVER MODE ON
LITHIUM BATTERIES.
14.8V
2A
1.2-120Ah Batteries
12V NORM COLD/AGM
For charging 12-volt batteries in cold
temperatures below 50°F (10°C) or
AGM batteries. When selected, the LED
will illuminate.
14.7V
3.8A
12-120Ah Batteries
12V SMALL
For charging 12-volt Flooded, Gel,
Maintenance-Free batteries. When
selected, the LED will illuminate.
14.5V
900mA 1.2-12Ah Batteries
6V NORM
For charging 6-volt Flooded, Gel,
Maintenance-Free batteries. When
selected, the LED will illuminate.
7.3V
3.8A
12-120Ah Batteries
6V COLD/AGM
For charging 6-volt batteries in cold
temperatures below 50°F (10°C) or
AGM batteries.
7.4V
3.8A
12-120Ah Batteries
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE
