Battery Testing
Built to
outlast
everything.
Since 2015, Ohmmu has engineered the world's most rigorously tested 12V batteries — purpose-built for EVs, overland builds, and every climate on earth.
Where It
All Started
We began as BattMobile Batteries — a team of EV enthusiasts who believed Tesla and other EV owners deserved a dramatically better 12V battery than the outdated lead-acid technology their vehicles shipped with.
That conviction turned into a product, a product into a company, and a company into a global track record. Today, Ohmmu batteries operate in every region of the world — from arctic winters to scorching desert summers — and keep performing where others fail.
Over eight years of continuous improvement through every generation, we're proud of how far we've come. We remain committed to delivering even better.
Extraordinary
Performance
Doesn't Just Happen.
Ohmmu invested significantly in building a state-of-the-art R&D lab where every battery cell and assembly faces the ultimate test. No other provider of 12V battery solutions performs the same level of OEM Tier-1 grade testing — and that's exactly why we were selected as the first Tier-1 supplier for 12V LiFePO4 batteries.
Thermal chamber testing
Our in-house Thermotron chamber pushes batteries to extremes no road will ever match. From −70°C (−94°F) arctic cold to +185°C (365°F) desert heat — every product is tested across the full spectrum before it ships. If it survives our lab, it survives your life.
Vibration simulation
OEM automotive-grade vibration testing subjects each battery to up to 60 continuous hours at frequencies between 10 and 1,000 Hz. This testing runs after thermal stress — because real-world batteries face both, and in our lab so do ours.
Cycle & load testing
Continuous charge and discharge at currents exceeding 100A simulates years of real-world use in days. We run full cycle testing under deep cold, extreme heat, and vibration simultaneously — because your battery doesn't get perfect conditions either.
Real Ah. Real Capacity.
No Marketing Tricks.
Most lithium battery sellers inflate capacity using "Lead Acid Equivalent" language — a trick that makes their numbers sound bigger than they are. At Ohmmu we made a commitment from day one: we will never do that.
We rate our batteries in REAL Ah, tested at the demanding C/5 rate so you know exactly what you're getting. Lead-acid batteries are tested at C/20 — a very light 5A load on a 100Ah battery. Lithium should be tested at C/5, a 20A load — which reflects real-world use.
At that standard, our Gen 5 Group 31 delivers an astonishing 180Ah / 2,304Wh of real capacity — the highest capacity LiFePO4 Group 31 battery on the market. Competing LFP products barely reach 90Ah under the same test. There is no comparison.
| Battery | Test Rate | Capacity | Verdict |
|---|---|---|---|
| Lead Acid / AGM | C/20 (light load) | ~90 Ah | Inflated |
| Competing LFP | C/5 (real load) | <90 Ah | Under-delivers |
| Ohmmu Gen 5 Group 31 | C/5 (real load) | 180 Ah | ✓ Verified |
The Numbers
Don't Lie.
A 30-foot diesel pusher RV requiring a 9kWh battery bank at 12V. Here's what the math looks like when you choose Ohmmu over traditional AGM.
In a Sprinter van with a single Group 31 slot, switching to the Ohmmu Gen 5 gives you 180Ah of real capacity — nearly double the usable energy of AGM — at just 36.2 lbs, roughly one-third the weight of lead-acid. With self-heating technology and a Bluetooth BMS built in, the Gen 5 is the most advanced Group 31 battery on the market. Period.
Built For
Your World.
Make the
switch today.
Join thousands of EV owners, overlanders, and fleet operators worldwide who've already made the switch to Ohmmu.