What Is the Smallest 12V Lithium Battery? Redodo 100Ah Mini Battery Review

Whether you’re powering a kayak trolling motor, RV, or portable solar setup, compact and lightweight power solutions are a top priority.

But what is the best, smallest 12V battery that still delivers strong capacity, safety, and long lifespan? In this article, we’ll take a detailed look at the powerful yet space-saving battery, exploring its features, performance, and how it perfect fits your next adventure.

What Is the Smallest 12V Battery?

When we search for the smallest 12V battery, we’re usually looking for a compact power solution that saves space but still provides dependable performance. The term “smallest” can refer to both physical dimensions and weight.

Traditional lead-acid batteries are bulky and heavy, even in low capacities like 20Ah or 35Ah. While these options are physically smaller, they often deliver limited runtime, require maintenance, and can’t handle deep discharges without damaging the battery.

The smallest 12V battery today are turning to lithium technology, which allows for much higher energy density, storing more power in a lighter and smaller body.

Among the available options, the Redodo 12V 100Ah Mini LiFePO4 Battery stands out as one of the smallest and lightest 12V lithium batteries on the market.

Measuring only 10.24 x 5.24 x 8.96 inches and weighing about 19 lbs, the around 35% smaller and lighter than a typical 100Ah LiFePO4 battery. It still delivers full 100Ah capacity, a 4000+ cycle life, and all the safety features you’d expect from a premium lithium battery. It’s the perfect balance of compact size and powerful performance.

View the Product

Why Choose Small 12V Lithium Batteries?

Compact 12V lithium batteries have become a popular choice for RV owners, boaters, and off-grid users who want reliable power without the bulk. These small packs provide the key benefits like:

Compact Size Saves Space

If your setup has limited room, like a small RV, canoe, or tiny cabin, every inch counts. A compact 12V lithium battery takes up less space, giving you more flexibility for other equipment or storage.

Lightweight and Easy to Carry

Small lithium batteries are much lighter, especially compared with the same capacity lead-acid batteries. This makes them perfect for outdoor use. You can easily lift, install, or move them without heavy lifting.

Higher Energy Density

One of the biggest advantages of small 12V lithium batteries is their higher energy density. Compared with a standard 12V 100Ah lithium battery, a small 12V 100Ah mini model provides higher energy density — they store the same energy of 1280Wh in a smaller and lighter package.

More Eco-Friendly

Lithium batteries are cleaner and greener than lead-acid ones. They contain no acid or heavy metals, have higher energy efficiency, and produce less waste over their long lifespan, helping reduce your overall carbon footprint.

Strong Compatibility

Even with their compact size, small 12V lithium batteries keep the same compatibility benefits as standard 12V batteries. They work with a wide range of 12V devices, including RV lights, fish finders, fridges, and solar systems. Their stable voltage and efficient output ensure smooth performance across different types of equipment.

Expandable for High Power Needs

Need more power later? No problem. Most compact lithium batteries, like the Redodo 12V 100Ah Mini, support up to four batteries in series or parallel connections, allowing you to expand capacity or increase voltage to match growing energy demands.

Top Solution: Redodo 12V 100Ah Mini LiFePO4 Battery

Redodo designed a compact yet powerful solution — the 12V 100Ah Mini LiFePO4 Battery. It redefines what a small 12V lithium battery can do by combining lightweight design, strong 100Ah capacity, and advanced safety in a space-saving form factor.

Key Features of Redodo 12V 100Ah Mini LiFePO4 Battery

What makes it best?

This battery is one of the lightest 12V batteries available, providing full 100Ah capacity in a compact shell, about 35% smaller and 18% lighter than standard 12V 100Ah batteries of the same rating.

1. Big Power, Small Size

Problem: Most small batteries can’t deliver enough runtime for your motor or camping setup.

Redodo Solution: The Redodo 12V 100Ah Mini LiFePO4 battery is one of the lightest 12V batteries available, but it packs a full 100Ah (1280Wh) of usable energy, enough to power your 30-70lb trolling motor for hours, or keep your RV lights and fridge running all day. You get all the power you need without the bulk!

2. Light Enough to Carry Anywhere

Problem: Even “small” lead-acid batteries are heavy and hard to move.

Redodo Solution: Weighing only 19 lbs, this battery is truly portable — nearly 70% lighter than a traditional 100Ah lead-acid battery, 18% lighter than a standard 100Ah lithium battery. Whether you’re lifting it into your kayak or tucking it under an RV seat, you’ll appreciate how easy it is to handle.

3. Long Life, Real Savings

Problem: Small batteries usually wear out after a year or two. Lithium is tapically more expensive.

Redodo Solution: The Redodo Mini uses EV-grade LiFePO4 cells that last 4000+ cycles with over 10 years of regular use. That means less money wasted on replacements and more time enjoying your adventures with reliable power. What’s more, the price is only ~$219, much affordable than other LiFePO4 battery brands.

4. Worry-Free Safety Protection

Problem: Many compact batteries skip important safety features.

Redodo Solution: Redodo’s lithium batteries build in advanced BMS (Battery Management System) to prevent overcharging, over-discharging, overcurrent, short circuits, and high temperatures. You can use the battery confidently without any safety concerns.

5. Built Tough for the Outdoors

Problem: Smaller batteries can be fragile or easily damaged by moisture or vibration.

Redodo Solution: The Redodo Mini has a durable case that’s IP65-rated against water and dust. Whether it’s bouncing in your boat or mounted in a camper van, it can handle the bumps and splashes of real outdoor life.

6. Grow Your Power Anytime

Problem: When your energy needs grow, most small batteries can’t expand.

Redodo Solution: The Redodo Mini is scalable, you can connect up to 16 units in parallel or series for larger systems up to 48V or 20.48kWh. Start with one and build up as your adventures expand.

7. A Greener Choice for Our Planet

Problem: Lead-acid batteries leak, corrode, and contain toxic materials.

Redodo Solution: The Redodo Mini is eco-friendly LiFePO4, which means no acid, no fumes, and no heavy metals. It’s clean, maintenance-free, and can be safely recycled through professional processes, making it a truly green choice for energy storage.

Real Performance Review of Redodo 12V Mini Battery

So, how does this battery actually perform? We’ve gathered some feedback from real users who have experienced the Redodo 12V 100Ah MINI Lithium Battery. They were saying it delivers the same reliable 12V performance while saving space and weight on their setups.

@Jim:

Love the package size. I was able to put two in parallel in my Camper group 24 storage space. Even had room left! Totally pleased. I did bench test both batteries to verify ah and amps load. Both performed over 100amps each for a couple of mins.

@Richard:

My mini 100 amp batteries are more then I expected. They keep my 35 ft sailboat running smoothly. I just added two more as a 2nd bank of house batteries. Lithium has changed how I live while traveling. Great product.

@William:

These 100 amp mini are great batteries, been using for three months in my camper coupled with two 175 watt solar panels and have not had to plug into shore power. Running fridge, fans, lights, water pump etc. Replaced two AGM group 27 that were always failing me, with three MINIs that fit in less space.

A YouTuber @The Solar Lab reviewed the Redodo 12V 100Ah MINI. Learn more about the compact battery in this video.

Conclusion: Smallest 12V Battery with Big Performance

What is the best and smallest 12V battery on the market? The Redodo 12V 100Ah Mini LiFePO4 Battery gives us the answer. It not only solves the common issues of traditional batteries being bulky and difficult to install, but also offers greater installation flexibility and more room for system expansion.

If you’re looking for a reliable and lightweight lithium battery for your RV, boat, off-grid setup, or solar system, the Redodo 12V 100Ah Mini is an economical and dependable choice that delivers exceptional performance.

Ready to Upgrade?

Explore the Redodo 12V 100Ah Mini LiFePO4 Battery and experience a lighter, smarter, and more efficient energy solution today!

Redodo 12V 100Ah Mini Lithium LiFePO4 Battery $ 219.99 Shop Now

Subscribe to our newsletter for more insights and get an exclusive discounts on battery.

Read More:

6 Best Lightweight Trolling Motor Batteries in 2025

A Full Review of Redodo 12V 100Ah Battery Series

Redodo 12V 140Ah Group 31 Deep Cycle Battery Review

Choosing Best Battery for Your Kayak Trolling Motor

6 Top RV Battery Recommendations in 2025