Two years ago, we made a bet on sodium. It paid off.
When we launched our 12V sodium batteries, the chemistry looked exceptional on paper - huge cold cranking amps, real performance in temperature extremes that punish other chemistries, a safety profile we were amazed by, and an affordable alternative to lithium.
What we didn't have yet was time.
Spec sheets and lab testing are one thing. But thousands of batteries out in EVs, cars, trucks, overland rigs, and commercial fleets across two winters and two summers is another. Now we have that data.
And it's very good...
Effective immediately, all existing and future Ohmmu sodium batteries now carry a 4-year full replacement warranty, up from 3.
That puts sodium on equal footing with our lithium line, which has held the longest warranty in the category for years. This isn't a promotion or a limited-time offer. It's us putting our money where our data is.
What this means for you:
Already own an Ohmmu sodium battery? The best news is that this extended coverage applies to you automatically. Nothing to register, nothing to claim, nothing to pay and absolutely nothing to do. We have your original purchase date on file and we're just adding an extra year of coverage.
Been considering an Ohmmu sodium battery? Same battery, same price, one more year behind it.
Where sodium wins
We built sodium for a specific job, and it does that job better than anything else, making this is the most durable and climate-resilient 12V battery available on the market.
| • | The highest CCA on the market with up to 3× the starting power of lead-acid and AGMs |
| • | Climate-proof performance in extreme heat and extreme cold, where other chemistries start making excuses |
| • | Significantly lower thermal runaway risk than lithium chemistries |
| • | About one-third the weight of the lead-acid battery it replaces |
| • | 3000+ cycles that matches lithium's lifespan |
| • | The most cost-effective and affordable path off lead-acid, especially measured in CCA per dollar |
If you run diesel, operate off-road or overland, or live somewhere the thermometer has opinions, sodium is the right call.
Where lithium still leads
We'd rather tell you this straight in case you didn't already know. Our LiFePO4 batteries remain the performance standard, and there are real reasons to choose them over sodium. Our smart lithium battery offers higher usable capacity, greater efficiency, durability, and performance.
| • | Higher energy density means more amp hours in the same physical footprint |
| • | Battery management system that actively manages cell balancing and protects against overvoltage, undervoltage, overcharge, temperature extremes, and short circuits. |
| • | Bluetooth connectivity and control allows you to connect straight to the BMS from your phone to watch voltage, current, temperature, and time to full or empty in real time. Sodium doesn't offer that - yet. |
| • | Self-heating Technology that warms cells during charging in deep cold |
| • | Lighter still at roughly half the weight of lead-acid, and lighter than sodium per overall amp hour |
Choose lithium if weight, capacity, and app-based monitoring matter most. Choose sodium if you want maximum cranking power, climate resilience, and the best value per dollar.
Either way, you're getting an Ohmmu — and now, either way, you're getting four years of full-replacement warranty coverage.
The Electrified Series Sodium lineup
If you drive an EV or hybrid, this is your side of the lineup. Our sodium line is a massive upgrade and maintenence-free drop-in replacement for your EV.
U1R Tesla Model S · 10 lbs $379 View |
B19 Tesla 3/Y, Leaf · 10 lbs $379 View |
BT19 Rivian R1S/R1T · 6 lbs From $359 View |
Browse all EV & hybrid batteries →
The Adventure Series Sodium lineup
Built for overland, off-road, off-grid, RV, marine, commercial and heavy duties. Sodium's stability and temperature range make it a natural fit for 12V starter and/or auxiliary duty.
H5 / Group 24F 1,200 CCA · 13 lbs $379 View |
H7 / Group 27F 1,400 CCA · 17 lbs $379 View |
Group 31 · 100Ah 2,000 CCA · Deep cycle $599 View |
And it's still getting better...
Ohmmu's sodium 12V batteries already outclass lead-acid on every front: power, climate-proof, maintenance-free, and built to outlast anything else in the market. But it's not staying still for long. Behind the scenes, we're still finding ways to improve this platform.
We can't spill the details yet, but the next generation of Ohmmu sodium batteries is already taking shape.
Questions about which chemistry fits your setup? Our US-based techs answer them for free — no purchase required. Reach out anytime.
Thanks for trusting us with your adventures.
— The OHMMU ENERGY Team
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Welcome to the new Ohmmu Energy!