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HJ-S34B20R GS Yuasa Auxiliary AGM Battery

Name: HJ-S34B20R Battery
Brand: Yuasa
SKU: HJ-S34B20R
Price: 144.42 GBP
Availability: OutOfStock

£144.42

Yuasa auxiliary, backup & specialist Battery range. Ideal for the unique requirements of vehicles with auxiliary battery systems.

Out of stock

Prices Inc. VAT. Free next day delivery if ordered before 3pm (UK mainland). Details.

McMartins: Powering Your Journey, Inside and Out

As a family-run business, we leverage a legacy of technical expertise that stretches back to 1972 to supply you with the best parts and accessories.

Our team have supplied garages and retailers across the UK - and now we’re bringing the same quality of products and expertise directly to motorists.

Family‑run, UK‑based specialists. Trusted by consumer and trade. Delivered to your door.

McMartins is a forward-thinking automotive parts and accessories retailer built on a foundation of technical expertise, quality products, and unwavering commitment to the customer. While our name is synonymous with battery excellence - the critical power source for every vehicle - we have grown to become a comprehensive partner for all your car care, maintenance, and enhancement needs.
We serve the everyday driver, the dedicated DIY mechanic, and professional repair shops alike, ensuring every vehicle gets the power and parts it needs to perform reliably.

Our Core Pillars: The McMartins Difference

Our business model is built on three essential pillars that guide every decision, from product selection to customer service:

1. Battery Mastery: The Heart of Our Business

Deep Expertise: Our initial focus and enduring strength is in power solutions. We stock a vast array of batteries for everything from standard combustion engines and high-demand modern vehicles to specialized batteries for motorcycles, boats, and electric vehicle (EV) auxiliary systems.
The Right Fit Guarantee: We utilize advanced fitment technology to ensure every customer is matched with the exact CCA, Group Size, and technology (Lead-Acid, AGM, EFB, Lithium) required by their specific vehicle.
Sustainability Focus: We are committed to responsible battery life cycle management, offering robust battery testing and free, ethical recycling services for old units.

2. Curated Quality Parts: Reliability First

Essential Maintenance: We supply the parts you need to keep your car safe and running smoothly, including:
- Batteries: Traditional Led-Acid, Lithium and more.
- Battery Chargers
- Jump Starters
Vetted Suppliers: Unlike general retailers, we partner only with trusted, industry-certified manufacturers to guarantee the quality and durability of every component we sell.

3. Smart Accessories & Tools: Empowering the Driver

Modern Automotive Life: We stock a range of accessories that enhance both the driving experience and the garage workflow.
Product Categories Include: Battery chargers and jump starters, portable power packs, high-performance lighting, and premium diagnostic tools for the DIY market.

Our Customer Commitment: Service, Simplified

At McMartins, we understand that car maintenance can be confusing and intimidating. We strive to make the process as straightforward and stress-free as possible.

Commitment	What It Means for You
Expert Advice	Our staff is trained not just in sales, but in automotive diagnostics. We provide personalized, non-jargon advice to solve your problem quickly and correctly the first time.
Effortless Fitment	Our systems confirm part compatibility before you buy, eliminating guesswork and costly returns.
True Value Pricing	We offer competitive pricing on premium brands, ensuring you get the best combination of quality and affordability.

Looking Ahead: The Future of McMartins

The automotive landscape is constantly evolving, with new technologies like hybrid and electric vehicles becoming mainstream. McMartins is committed to staying ahead of this curve:

EV Ready: We are continually expanding our offerings to include auxiliary batteries for electric and hybrid vehicles, alongside advanced charging and monitoring accessories.
Digital Integration: We are investing in our online platform to provide hyper-accurate digital fitment tools, detailed instructional content, and seamless service.
Community Focus: We aim to be a resource for local mechanics and enthusiasts through workshops, trade programs, and local sponsorship.

McMartins is more than just a parts store - we are your partners in vehicle reliability and performance.

SKU: HJ-S34B20R

Barcode: 5050694030413

Brand: Yuasa

Our Top Pick/Upgrade Options

Description

Voltage: 12v | Capacity: 35Ah | Engine Start-Stop Compatible: No

Features

9 Flooded auxiliary batteries with Glass Mat separators
2 AGM backup batteries
1 AGM starter battery

Fitment Examples

Toyota, Honda & Lexus Hybrids
Mercedes E & S Class

Technical Information

Case Type	B20 JIS
Voltage	12v
Capacity	35v
Cold Cranking Performance (Amps) EN1	272
Weight (Kg)	10.5
Cell Layout	1
Terminal Type	T3
Recommended Charge Rate (Amps)	2
Handles	No
End-Venting	Yes
State Of Charge Indicator	No
Length (mm)	272
Width (mm)	129
Height (mm)	227

Diagrams

Layout: 12V-1

Terminal: T3

Container Feature: N

Compatible Vehicles

Compatible vehicles for HJ-S34B20R Battery

Please be aware that some vehicles may not appear on our fitment list but may still be compatible with this item. Please check your manufacturers recommendations or specifications for this information.
While we make every effort to ensure all fitment and compatible parts data is complete and correct, it is your responsibility to check this information and ensure you are fitting the correct part and specification to suit your vehicle. Compatible products and notes are used at your own risk, and are displayed as a reference only. We cannot accept any liability for the use of any incompatible parts.

Manuals, Datasheets & Other Downloads

About Yuasa

Why choose Yuasa?

Yuasa batteries are highly regarded for several core reasons that make them a superior option:

Reliability and Longevity: Yuasa is renowned for producing batteries with long service lives and consistent, dependable performance. This means less worry about premature failure and a better return on investment.
High Quality Construction: They use advanced manufacturing techniques and high-quality internal components, often resulting in superior vibration resistance, better charge retention, and overall robustness compared to many budget brands.
Industry Expertise: With over 100 years of experience, Yuasa (now part of GS Yuasa) is a global leader in battery technology, continually innovating to meet the demanding specifications of modern vehicles.

What Being an OEM Supplier Means for you

The fact that Yuasa is an OEM supplier is perhaps the most convincing reason to choose it, as it validates the quality of the product:

Meets Exact Vehicle Specifications: OEM means the battery is supplied directly to vehicle manufacturers to be fitted in brand-new vehicles coming off the assembly line. These manufacturers require batteries to meet incredibly rigorous performance, size, and safety standards.
Guaranteed Fit and Performance: Since the battery meets the exact specifications set by the vehicle maker, a buyer can be confident that it will fit perfectly and deliver the precise power and capacity required by their vehicle's electrical system.
The Gold Standard: Vehicle manufacturers choose Yuasa because their batteries are proven to meet the highest benchmarks for quality and durability. By choosing Yuasa, you are buying the exact same quality component the manufacturer trusts to power their vehicle from day one.

In short, when you buy a Yuasa battery, you are getting the original factory-fitted quality and performance, which is a significant upgrade over a generic aftermarket option.