Millertech Marine 4-Bank LiFePo4 Lithium Battery Charger


This MillerTech, 4-bank, marine Lithium battery charger was specifically designed for the avid fisherman who only settles for the very best! Our goal, when designing and developing this charger was to create a high-quality, feature-rich, marine battery charger that is reliable and simple to use, making your experience seamless and enjoyable! Our charger produces 40A continuous, meaning 10A is going into each of your 4 batteries at all times, (from start to finish) unlike conventional chargers that taper off halfway through the charge and take a long time to actually complete the cycle. What this means for you, is less charging time and more fishing time, which is really all that matters, correct?


Technical Specs

Input 80-120V AC 60Hz
Output Power 40A = 10Ax4 (independent)
Output Voltage 14.5V

Protection Specs

Waterproof Rating IP67
Over voltage output protection Yes
Short circuit protection Yes
Reverse polarity protection Yes
Over current protection (dual blade): fuse) Yes

LED Indicator Specs

Fully charged or No connection Green
Normal Charging Red

  • It is extremely compact, with convenient mounting options that will make installation a breeze! Heavy Duty aluminum alloy body works great as a heat sync, plus creates a robust charger that is nearly indestructible.
  • No buttons to push, lights to diagnose, and no long user manual to ponder over. Simply mount it, connect it and use it!
  • This charger can also effectively charge your AGM or SLA batteries, (when charging these types, we recommend disconnecting the charger soon after the batteries become fully charged).
  • This charger can also be used in many different configurations!
    • Example: 1 battery = 4 positive leads and 4 negative leads, you will now be charging at 40A to 1 battery.
    • Example: 2 batteries = 1 lead set to each battery, remaining 2 lead sets are empty, now you are charging each battery at 10A Since each lead set is 100% isolated for all the others, this charger is truly versatile! If you at any time have questions about using this charger in your application, please contact us freely, we would be more than happy to discuss your needs with you and help you make the best decision. Your satisfaction is, and will always be our first priority!

Standard One Year Warranty:

MillerTech warrants this product to be free from defects in workmanship and materials, under normal use conditions, for one (1) year from the original invoice date.
Return shipping and handling fees are to be paid for by the customer. The manufacturer agrees, at its discretion during the
warranty period to repair, replace, or to furnish a repaired or refurbished
product of equal or greater value in exchange without charge. (except for return shipping costs)
Such repair or replacement is subject to verification of the product defect or malfunction and proof of purchase as confirmed by showing the
model number on original dated sales receipt.

This warranty does not include:
* Any condition resulting from other than ordinary residential wear or any use for which the product was not intended.
* Any condition resulting from incorrect or inadequate maintenance or care
* Damage resulting from misuse, abuse, negligence, reverse polarity, short circuit, loose connections, accidents or shipping damage
* Dissatisfaction due to buyer’s remorse
* Normal wear and tear
* Damages incurred during transportation
* Damages incurred during assembly or maintenance
* Any used or previously displayed items

Please retain invoices for a minimum of one year for warranty purposes.
* Claims for defective merchandise must be made within ONE year from invoice date.
* Claims for missing parts must be made within 60 calendar days after the merchandise is received
* Any claim for defective merchandise returns must be packed in original packaging
* We reserve the right to specify that items be returned to the original warehouse for inspection or be inspected by our representative in the field
* Pictures are beneficial to claim defective merchandise, along with a copy of the original invoice
* If the claim is justified, the item(s) or part(s) will be repaired or replaced with a similar product that has an equal or higher value than the original product.
* It is our policy to replace parts whenever possible
* This warranty gives you specific legal rights. You may have other rights, which vary from state to state.

Warranty Claim Contact:
Phone: 855-629-5484 (8am – 4pm EST)
Email: [email protected]
MillerTech Energy Solutions LLC
Lester Miller / General Manager

Customer Reviews

Based on 3 reviews
Switched out the Minn Kota precision.

Works great. I feel like I get a better charge out of this than a standard marine charger.

Cindy Miller


David Hasty
LIFE PO 4 bank Charger

Works great, first time switching over to lithiums and a 4 bank charger. Have no complaints, everything has worked flawlessy

What the pros are saying about Miller Tech batteries

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