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Minn Kota MK-440 4 Bank 10 AMP Precision Onboard Battery Charger
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$559.99
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SKU: WX2*0726020
Overview
Built for anglers who rely on multiple batteries through long days on the water, this onboard charger is designed to keep charging organized and consistent. Its selectable battery type setting supports 12V AGM, 12V flooded lead acid, and 12V lithium (LiFePO4), giving you a charge profile matched to the battery in use. Automatic temperature compensation and low-line voltage compensation help maintain charging performance when conditions or power supply vary, while the microprocessor-based control adds a layer of protection and control. Waterproof, shock-resistant, and vibration-resistant construction makes it a practical choice for boats where the charger stays installed and ready.
Why Hunters Choose the Minn Kota
Four-bank Design
Supports charging multiple batteries from
10-amp Output
Dedicated charging capacity across all
Selectable Battery
Type supports 12V AGM, flooded
Automatic Temperature
Compensation adjusts charging to ambient
Low-line Voltage
Compensation helps maintain consistent charging
Key Features
- 4-bank onboard charger with 10 amps per bank
- Supports 12V AGM, 12V flooded lead acid, and 12V lithium (LiFePO4) batteries
- Selectable battery type helps provide a safe, protected charge
- Automatic temperature compensation adjusts to ambient temperature fluctuations
- Low-line voltage compensation helps maintain consistent charging when outlet voltage drops
- Digitally microprocessor-based control with automatic wake for dead 12V lithium (LiFePO4) batteries
- Waterproof, shock-resistant, and vibration-resistant construction
Best Used For
- Anglers running multiple batteries who want onboard charging between trips and launches
- Boat owners using 12V AGM, flooded lead acid, or lithium LiFePO4 batteries
- Users needing automatic temperature and low-line voltage compensation in changing conditions
- Operators who prefer a waterproof, shock-resistant, vibration-resistant charger for onboard installation
- Those wanting microprocessor-based control and battery equalization for lead acid maintenance
Specifications
| Amperage | 10 AMP |
|---|---|
| Automatic Temperature Compensation | Yes |
| Bank Count | 4 |
| Battery Equalization | Yes |
| Battery Type Support | 12V AGM, 12V flooded lead acid, 12V lithium (LiFePO4) |
| Can Wake Dead 12v Lithium Batteries From Standby | Yes |
| Digitally Microprocessor Based Control | Yes |
| Led Indicator Lights | Yes |
| Low Line Voltage Compensation | Yes |
| Selectable Battery Type | Yes |
| Shock Resistant Construction | Yes |
| Vibration Resistant Construction | Yes |
| Waterproof Construction | Yes |
Pros
- Four-bank design supports charging multiple batteries from one onboard unit.
- 10-amp output provides dedicated charging capacity across all four banks.
- Selectable battery type supports 12V AGM, flooded lead acid, and lithium LiFePO4 batteries.
- Automatic temperature compensation adjusts charging to ambient temperature changes.
- Low-line voltage compensation helps maintain consistent charging when outlet voltage drops.
- Waterproof, shock-resistant, and vibration-resistant construction suits onboard use.
Considerations & Trade-offs
- The charger is limited to 12V AGM, 12V flooded lead acid, and 12V lithium (LiFePO4) batteries, so it is not a universal fit for every battery setup.
- As a 4-bank, 10-amp onboard charger, it is designed for multi-battery charging, but the available description does not specify charging time by battery size or state of discharge.
- Automatic temperature compensation and low-line voltage compensation help maintain charging consistency, but actual results still depend on ambient conditions and the quality of the power source.
- The battery equalization feature is specific to lead acid batteries, so that benefit does not apply to lithium (LiFePO4) batteries.
Suggested Comparisons
- Onboard marine battery chargers
- Multi-bank battery chargers
- 12V lithium battery chargers
- AGM and flooded lead-acid battery chargers
Suggested Accessories
- Battery charger
- Battery maintenance accessory
- Marine electrical accessory
- Lithium battery charging accessory
Frequently Asked Questions
What battery types does the Minn Kota MK-440 support?
It supports 12V AGM, 12V flooded lead acid, and 12V lithium (LiFePO4) batteries.
Is this charger designed for multiple batteries at once?
Yes. The MK-440 is a 4-bank onboard battery charger, so it is built to charge up to four batteries.
Does the charger adjust for temperature or low outlet voltage?
Yes. It includes automatic temperature compensation and low-line voltage compensation to help maintain a consistent charge under changing conditions.
Can it charge lithium batteries that are in standby?
According to the product description, the digitally microprocessor-based control can wake dead 12V lithium (LiFePO4) batteries from standby automatically.
What kind of construction does the charger have for marine use?
The description says it has waterproof, shock-resistant, and vibration-resistant construction.