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Minn Kota MK-318 3 Bank 6 AMP Precision Onboard Battery Charger
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$319.99
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SKU: WX2*0726017
Overview
Built for anglers who want dependable charging between trips, this onboard unit is designed to keep multiple batteries ready without adding extra hassle at the dock or in the garage. Its selectable battery type setting supports 12V AGM, 12V flooded lead acid, and 12V lithium (LiFePO4), allowing the charge profile to match the battery being used. Automatic temperature compensation, low-line voltage compensation, and microprocessor-based control help it adapt to changing conditions, while LED indicators provide a clear status check. The waterproof, shock-resistant, and vibration-resistant construction makes it a practical choice for boats that see regular use and rough transport.
Why Hunters Choose the Minn Kota
Three-bank Onboard
Charger supports multiple batteries from
Selectable Battery
Type supports 12V AGM, flooded
Automatic Temperature
Compensation adjusts charging to ambient
Low-line Voltage
Compensation helps maintain a consistent
Waterproof, Shock-resistant,
Vibration-resistant construction suits demanding boat
Key Features
- 3-bank onboard charger with 6 amps total output
- 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 below 120V
- Digitally microprocessor-based control with LED indicator lights
- Waterproof, shock-resistant, and vibration-resistant construction
Best Used For
- Anglers needing onboard charging for multiple 12V batteries in a single boat setup
- Users charging 12V AGM, flooded lead acid, or lithium (LiFePO4) batteries
- Boat owners wanting automatic temperature and low-line voltage compensation
- Hunters and anglers who need a waterproof, shock-resistant, vibration-resistant charger
- Users looking for a microprocessor-controlled charger with LED status indicators
Specifications
| Amperage | 6 AMP |
|---|---|
| Automatic Temperature Compensation | Yes |
| Battery Equalization | Yes |
| Battery Type Selector | Yes |
| Can Wake Dead 12v Lithium Batteries From Standby | Yes |
| Digitally Microprocessor Based Control | Yes |
| Led Indicator Lights | Yes |
| Low Line Voltage Compensation | Yes |
| Number Of Banks | 3 |
| Shock Resistant Construction | Yes |
| Supported Battery Types | 12V AGM, 12V flooded lead acid, 12V lithium (LiFePO4) |
| Vibration Resistant Construction | Yes |
| Waterproof Construction | Yes |
Pros
- Three-bank onboard charger supports multiple batteries from a single unit.
- Selectable battery type supports 12V AGM, flooded lead acid, and lithium batteries.
- Automatic temperature compensation adjusts charging to ambient conditions.
- Low-line voltage compensation helps maintain a consistent charge below 120V.
- Waterproof, shock-resistant, and vibration-resistant construction suits demanding boat use.
- LED indicator lights provide clear charging status at a glance.
Considerations & Trade-offs
- This charger is limited to 12V AGM, 12V flooded lead acid, and 12V lithium (LiFePO4) batteries, so it is not a universal solution for other battery types or voltages.
- The 3-bank, 6-amp design is built for onboard charging, which makes it a more specialized setup than a portable charger for occasional use.
- Features like automatic temperature compensation and low-line voltage compensation help maintain charging consistency, but actual results still depend on the battery type and the power available at the outlet.
- Battery equalization is described for lead acid batteries, so that function does not apply to lithium setups.
Suggested Comparisons
- Onboard battery charger
- Multi-bank battery charger
- Lithium-compatible marine battery charger
- 12V battery charger
Suggested Accessories
- Battery charger
- Marine battery
- Battery maintenance accessory
- Electrical extension cord
Frequently Asked Questions
What battery types can the Minn Kota MK-318 charge?
The charger supports 12V AGM, 12V flooded lead acid, and 12V lithium (LiFePO4) batteries.
Is the MK-318 designed for onboard use in a boat?
Yes. It is an onboard battery charger with waterproof, shock-resistant, and vibration-resistant construction.
Does this charger adjust for temperature changes?
Yes. It includes automatic temperature compensation that senses and adjusts to ambient temperature fluctuations.
Will it still charge properly if shore power voltage is low?
The charger includes low-line voltage compensation, which is designed to deliver a consistent charge even if the outlet produces less than 120V.
Can it recover a dead lithium battery?
According to the product description, the digitally microprocessor-based control can wake dead 12V lithium (LiFePO4) batteries from standby automatically.