Duracell AUX12 Auxiliary Battery for Start-Stop Systems

Duracell

MSRP: $124.99
$98.99
(Save $26.00)
SKU:
DURA-AUX12
Shipping:
Free Shipping
Type:
AGM
Group Size:
AUX12
Length:
5.5" - 5.9"
Width:
3.0" - 3.4"
Height:
5.0" - 5.4"
Polarity:
+ Left / - Right
Factory Activated:
Yes
Terminals:
Aux
Group Size:
401
Weight:
8.07 lbs
Voltage:
12V
Capacity:
10.5Ah
Capacity Group:
10 - 20Ah
CCA's:
170A
In Stock
Adding to cart… The item has been added

Product Description

Duracell SLI401AGM-AUX Auxiliary Battery

The Duracell AUX12 AGM stop start battery delivers the reliability that these vehicles require. Designed for premium efficiency, it provides 170 cold cranking amps (CCA) to power advanced electrical systems without voltage sag or light flicker. Built with absorbed glass mat technology, the AUX12 provides maintenance-free performance, reliable starting, and longer lifespans. Whether you’re replacing a failing factory auxiliary battery or upgrading for a long road trip, this 12V AGM battery is designed to restore confidence.

Features & Benefits

  • AGM Technology – Excellent performance, increased durability, and extended lifespan.
  • Ready to Install – Charged and ready to go right out of the box for quick and easy installation.
  • High Output – 170 cold cranking amps ensures reliable power in all weather conditions.
  • Temperature Tolerant – Excellent performance in both high and low temperatures.
  • Group 401 – Direct-fit replacement for applications calling for AUX12 or Group 401 batteries.
  • Left-Positive Polarity – Matches OEM configuration for trouble free installations.

Why Choose a Duracell Auxiliary Battery?

Electrical systems in modern vehicles are more complex than ever. A weak auxiliary battery can trigger warning lights, disable start-stop systems, or cause intermittent electronic issues. Duracell auxiliary batteries are built to meet these demands head-on, providing the stable reserve power your vehicle depends on every day. Backed by the trusted Duracell name, these AGM batteries are designed for long service life and dependable performance.


Duracell Ultra
SLI401AGM-AUX Specs
Group Sizes 401
AUX12
Polarity + Left / - Right
Type AGM
CCA's 170A
Voltage 12V
Capacity 10.5 Ah
Length 5.94" (151 mm)
Width 3.43" (87 mm)
Height 5.16" (131 mm)
Terminals  AUX Type Posts
Weight 8.07 lbs
Warranty 2 Years

Duracell SLI401AGM-AUX Battery Cross-Reference

Replaces Group 401 (AUX12) Batteries: AUX12, AUX12-AGM, MBTX12U, MTX-AUX12, SLI401AGM-AUX.

Important: Always confirm your battery's dimensions, terminal configuration, and specifications before purchase to ensure proper fit and performance.

Warranty Information

2 Year Warranty

Product Videos