Battery Tender 6/12 Volt 4 Amp Battery Charger - 10 Banks
Item #: 021-0134   |    Special Order: Ships in 2-3 Weeks

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Battery Tender 6/12 Volt 4 Amp Battery Charger - 10 Banks

Item #: 021-0134   |  Special Order: Ships in 2-3 Weeks

Reg. Price: $845.69
SALE Price: $749.95
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Price: $749.95

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3 Year Factory Direct Warranty
Brand New
100% Compatibility
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Product Specifications for Battery Tender 6/12 Volt 4 Amp Battery Charger - 10 Banks

BM Part #: 021-0134
Voltage: 6/12 Volt
Charging Rate: 40 Amp (4 Amp Per Bank)
Input Voltage: 120 VAC 50/60 Hz
Shipping Weight: 30.00Lbs
Warranty: 3 Year Factory Direct
Product Manual: Download
    • For charging Lead-Acid, AGM, Lithium Iron Phosphate batteries.
    • Simultaneously charges and/ or maintains up to ten 6V or 12V batteries or any combination from 1 to 10
    • Includes 10 alligator clips with 7.5 foot cable.
    • 10 bank battery charger for virtually all lead-acid batteries, either flooded or sealed, maintenance free, AGM (Absorbed Glass Mat).
    • To avoid dangerous dead-short sparking, microchip circuitry will not activate output voltage until clips are correctly connected to battery
    • Maintains batteries at full charge
    • Temperature compensated to ensure optimum charge voltage according to ambient temperature
    • Automatically switches from full charge to float charging mode
    • Reverse Polarity Protection to ensure user safety
    • Complete 4-step charging program (Qualification, Bulk Charge, Absorption Mode, Float Mode)
    • BTP microchip technology virtually eliminates battery destroying sulfation
    • Built in 72 hour timer will protect a marginal battery from over charging
    • Temperature Range: 0°F to 122°F nominal

Product Description

Free Standard Shipping!

Order today and receive free standard shipping on your Battery Tender 6/12 Volt 4 Amp Battery Charger - 10 Banks. Only valid in the contiguous 48 states and not valid with any other offer. Physical address required (No PO Boxes).

Safe, No Spark Charging! Deltran's advanced SuperSmart Battery Tender Battery Management System is light years ahead of any standard battery charger. It's the first fully automatic, constant-current 6/12 volt battery charger designed to charge and/ or maintain up to 10 6/12-volt batteries simultaneously @ 4 amps.

This Multiple Charging Station Shop Charger uses 10 independent Battery Tender Plus battery charger circuits in a single enclosure. Each circuit is a linear power converter that has a true DC output at a maximum power level of approximately 29 watts. It has a maximum output charging current of 4.0 amps. This is a higher current output than the stand-alone Battery Tender Plus battery charger circuits because each shop charger has an internal fan to provide forced air cooling of all active, semiconductor components.

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Tech Tip: Using A Multi-Bank Charger

Each bank of this charger is 4 amps. Combined, this is an output of 40 amps (10 banks of 4 amps each). This is commonly used in two ways:

  • Connect each bank to separate battery systems, charging both by 4 amps each.
  • Connect all banks to the same battery system, charging it by 40 amps total.

Cross Reference

The Battery Tender 6/12 Volt 4 Amp Battery Charger - 10 Banks has been cross-referenced to be compatible with or replace these OEM part numbers and models:

Customer Reviews

13 Reviews | 4.6 out of 5
5 stars (10)
4 stars (2)
3 stars (0)
2 stars (1)
1 star (0)
Would recommend this product.
What our Customers are saying
October 11, 2022
by on October 11, 2022

Best charger I have used

Would recommend to a friend?
Arrived broken...
March 19, 2021
by on March 19, 2021

This is a good battery charger, but the one I received had two dead channels and a dead power light. Called Battery Mart and they said to contact the manufacturer for a warranty claim. I was disappointed in this response as it is brand new and I think Battery Mart should deal with it as it wasn’t right in the box, but that’s where we are. Waiting to hear from Deltran on my unit. I will edit this review (if possible) when the issue is resolved.

Lake Forest, IL
Would recommend to a friend?
Works pretty well
February 26, 2016
by on February 26, 2016

This works well with one exception- it has a moderately loud cooling fan that runs continuously. I've got 8 batteries on it currently and even though all are in a float mode, the fan still runs all the time. As long as it continues to work like my single tenders do, I can live with the fan noise. It's just odd that the single tenders don't even have vent holes in some of them and the multi-battery tender has a continuous fan. Best pricing and quick shipping. It's worth it.

Would recommend to a friend?
Great Product
October 24, 2013
by on October 24, 2013

I have to maintain a fleet of motorcycle batteries that are factory activated so they need to be maintained constantly until they're put in a vehicle. This makes it easy for me to do them in bulk and alternate inventory to keep everything topped off.

Boston, MA
Would recommend to a friend?
Works Great - Marine, Motorcycle & Lawn
December 17, 2012
by on December 17, 2012

was delivered on time - Battery Mart had the best price - the same unit sells for up to $1,000.00 at alot of differant suppliers. I really like the fact that I could plug in my Lawn tractor, Marine & Motorcycle batteries all at once and just leave them -- no more throwing out batteries in the spring time - will pay for itself after this year

Brad Conlan
Forest, Ontario
Would recommend to a friend?
Great to extend battery life
December 2, 2012
by on December 2, 2012

Good maintainer

Chicago Illinoi
Would recommend to a friend?
Saves time and money at
May 6, 2012
by on May 6, 2012

We use this to charge and condition power wheelchair batteries here at

Paul P
Concord NH
Would recommend to a friend?