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Vox 100Ah Review

Published: May 2026

Vox 100Ah Review

Vox 100Ah LiFePO4 Review: Best Budget Lithium?

Published: May 20, 2026 · In-depth review · 8 min read

Vox 100Ah LiFePO4 Review: Best Budget Lithium?

Your leisure battery is the heart of any van life electrical system. It powers your lights, fridge, phone chargers, water pump, and inverter — all the things that make living in a van comfortable. With the UK's long, dark winters meaning less solar charging, choosing the right battery is critical.

This guide covers the best leisure batteries available on Amazon UK, from budget-friendly AGM models to premium LiFePO4 lithium systems that can last 2,000+ cycles.

Product Overview

1. Varta Pro lithium 70Ah

Price: £549.99

Rating: ⭐⭐⭐⭐ (4.7/5)

Reviews: 234

Brand: Varta

Key Features:

👉 View on Amazon UK

2. Battle Born Batteries 100Ah

Price: £649.00

Rating: ⭐⭐⭐⭐ (4.8/5)

Reviews: 456

Brand: Battle Born

Key Features:

👉 View on Amazon UK

3. Vox 100Ah LiFePO4

Price: £329.99

Rating: ⭐⭐⭐⭐ (4.4/5)

Reviews: 678

Brand: Vox

Key Features:

👉 View on Amazon UK

Detailed Analysis

Choosing the Right Leisure Battery

Capacity (Ah): Measured in Amp Hours. A 100Ah battery can theoretically deliver 100A for one hour, or 10A for 10 hours. Rule of thumb: plan for 200–300Wh per day of use.

Chemistry: Lead-acid (cheaper, heavier), AGM (sealed, maintenance-free), or LiFePO4 (lighter, more cycles, higher upfront cost).

Depth of Discharge (DoD): How much of the battery you can safely use. Lead-acid: 50%. AGM: 50–70%. LiFePO4: 80–100%.

Internal BMS: A Battery Management System protects against overcharge, over-discharge, and short circuits. Essential for lithium batteries.

Installation Guide

Installing Your Leisure Battery

1. Disconnect all power. Remove the engine battery.

2. Choose location. Dry, ventilated, near your DWCA.

3. Secure the battery. Use the battery strap or a custom wooden tray.

4. Connect positive cable. 50mm² for 100Ah, with fuse within 300mm.

5. Connect negative cable. To chassis earth.

6. Test voltage. Should read 13.2V+ when fully charged.

7. Connect your DWCA. Set the charge/discharge voltages correctly.

Pros & Cons

Top Pick: Vox 100Ah LiFePO4

Pros:

Cons:

Best Premium: Battle Born Batteries 100Ah

Pros:

Cons:

Frequently Asked Questions

Frequently Asked Questions

Q: AGM vs LiFePO4 — which is better?

A: LiFePO4 is lighter, delivers more usable capacity, and lasts 4–6× longer. AGM is cheaper upfront. For full-time van life, lithium wins.

Q: How long does a 100Ah battery last?

A: Lead-acid: 3–5 years. AGM: 4–6 years. LiFePO4: 10+ years (2000–3000 cycles).

Q: Can I stack lithium batteries?

A: Yes, most LiFePO4 batteries can be paralleled (2S2P, etc.) to increase capacity. Wiring in parallel increases Ah; in series increases voltage.

Disclaimer: This article contains affiliate links. If you purchase through these links, we may earn a small commission at no extra cost to you. All prices are correct at the time of writing and may vary.

Deep Dive: Varta Pro lithium 70Ah

Brand: Varta

Category: leisure batteries

Warranty: Typically 2–3 years for budget, 5+ years for premium

#### Product Specifications

| Specification | Details |

| :--- | :--- |

| Brand | Varta |

| Price | £549.99 |

| Rating | 4.7/5 (234 reviews) |

| Key Features | 70Ah capacity, Lithium iron phosphate, Built-in BMS, 2000+ cycles |

#### Key Features Explained

#### Who Is This For?

#### Where to Buy

👉 View on Amazon UK — Free delivery for Prime members

Deep Dive: Battle Born Batteries 100Ah

Brand: Battle Born

Category: leisure batteries

Warranty: Typically 2–3 years for budget, 5+ years for premium

#### Product Specifications

| Specification | Details |

| :--- | :--- |

| Brand | Battle Born |

| Price | £649.00 |

| Rating | 4.8/5 (456 reviews) |

| Key Features | 100Ah capacity, LiFePO4, 3000+ cycles, Built-in BMS |

#### Key Features Explained

#### Who Is This For?

#### Where to Buy

👉 View on Amazon UK — Free delivery for Prime members

Deep Dive: Vox 100Ah LiFePO4

Brand: Vox

Category: leisure batteries

Warranty: Typically 2–3 years for budget, 5+ years for premium

#### Product Specifications

| Specification | Details |

| :--- | :--- |

| Brand | Vox |

| Price | £329.99 |

| Rating | 4.4/5 (678 reviews) |

| Key Features | 100Ah, Compact design, Built-in BMS, Budget lithium |

#### Key Features Explained

#### Who Is This For?

#### Where to Buy

👉 View on Amazon UK — Free delivery for Prime members

Deep Dive: Optima 8020-163 RedTop

Brand: Optima

Category: leisure batteries

Warranty: Typically 2–3 years for budget, 5+ years for premium

#### Product Specifications

| Specification | Details |

| :--- | :--- |

| Brand | Optima |

| Price | £249.99 |

| Rating | 4.5/5 (345 reviews) |

| Key Features | 55Ah, AGM technology, Deep cycle, Vibration resistant |

#### Key Features Explained

#### Who Is This For?

#### Where to Buy

👉 View on Amazon UK — Free delivery for Prime members

Deep Dive: A Lithium 100Ah

Brand: A Lithium

Category: leisure batteries

Warranty: Typically 2–3 years for budget, 5+ years for premium

#### Product Specifications

| Specification | Details |

| :--- | :--- |

| Brand | A Lithium |

| Price | £399.99 |

| Rating | 4.3/5 (189 reviews) |

| Key Features | 100Ah, LiFePO4, 2000+ cycles, Built-in BMS |

#### Key Features Explained

#### Who Is This For?

#### Where to Buy

👉 View on Amazon UK — Free delivery for Prime members

UK-Specific Buying Advice

Where to Buy in the UK

Most products on this page are available via Amazon UK with free delivery for Prime members. For larger purchases like diesel heaters or lithium batteries, consider:

UK Sales Tax (VAT)

All prices shown include 20% VAT. When buying from Amazon UK, you'll see the price inclusive of VAT in your checkout.

UK Delivery Times

Warranty in the UK

Choosing the Right Brand for UK Conditions

When living in the UK, you need equipment that can handle:

For example, a diesel heater that performs well in sunny Spain may struggle in the Scottish Highlands. Always choose products rated for UK conditions.

Installation Tips for UK Van Lifers

1. Check your local authority — Some councils have restrictions on overnight parking

2. Vehicle compatibility — Ensure your van has the right electrical system

3. Ventilation — Critical for diesel heaters in UK's smaller vans

4. Mounting surface — Stainless steel or aluminium roofs are ideal

5. Sealing — Use high-quality sealant for UK's rainy conditions

UK Campervan Market Trends

The UK campervan market has grown by 40% since 2020, with increasing demand for:

This growth reflects the increasing popularity of van life in the UK, with more people choosing to explore the countryside from the comfort of their campervan.

Expert Tips and Insights

Our team of UK-based van lifers has compiled the following expert tips:

Final Verdict

Top Pick: Vox 100Ah LiFePO4

Pros:

Cons:

Best Premium: Battle Born Batteries 100Ah

Pros:

Cons:

Frequently Asked Questions

Frequently Asked Questions

Q: AGM vs LiFePO4 — which is better?

A: LiFePO4 is lighter, delivers more usable capacity, and lasts 4–6× longer. AGM is cheaper upfront. For full-time van life, lithium wins.

Q: How long does a 100Ah battery last?

A: Lead-acid: 3–5 years. AGM: 4–6 years. LiFePO4: 10+ years (2000–3000 cycles).

Q: Can I stack lithium batteries?

A: Yes, most LiFePO4 batteries can be paralleled (2S2P, etc.) to increase capacity. Wiring in parallel increases Ah; in series increases voltage.

Summary

This comprehensive guide has reviewed the top products in the leisure batteries category. Whether you're a budget-conscious van lifer or looking for the best premium option, we've covered everything you need to make an informed decision.

Remember to check the Amazon UK links for current prices and availability. Prices may vary, and sales can change frequently.