Ohmmu H8 / Group 49 100Ah Sodium 12V Battery Review — Is It Worth It? [2026]

In-Depth Review · 2026

Ohmmu H8 / Group 49 100Ah Sodium 12V

A sodium-ion battery with 2,000 cold cranking amps and a rated range from -40°F to 172°F.

$549.00

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2,000

CCA

-40°F

Low Temp

172°F

High Temp

29 lb

Weight

Quick Verdict

Is the H8 sodium battery worth buying?

Yes, if your problem is temperature. Sodium-ion is the unusual one here: it keeps working in extreme cold and heat, can be run down to 0V and recharged without damage (Ohmmu's claim), and delivers 2,000 CCA. It also costs less than the lithium models, at $549. The trade-off is weight, 29 lb, and the fact that monitoring needs an optional Ancel BM200 monitor.

Great forOverlanders, off-road builds and anyone in very hot or very cold climates.

Reconsider ifWeight matters most, or you want built-in Bluetooth monitoring without an add-on.

Overview

Built for places maps do not cover

This is part of Ohmmu's Adventure Series sodium range, sized for H8 or Group 49 trays. It fits vehicles such as Ineos, Jeep, Lexus, Nissan and Toyota, including dual-battery setups.

Key Features

What sets sodium apart

01 · Temperature

-40°F to 172°F

Ohmmu says sodium outperforms lithium in extreme temperatures, making it suitable for year-round outdoor use.

02 · Cranking

2,000+ CCA

Serious cold cranking amps for engine or equipment starts in demanding conditions.

03 · Resilience

Survives a full drain

Drain it to 0V on purpose or by accident and the cells remain healthy; charge back from 0%. That is the chemistry, per Ohmmu.

04 · Monitoring

Optional Ancel BM200

Pair with the Ancel BM200 monitor ($30) for real-time state of charge and diagnostics in an iOS and Android app.

Specifications

Full spec sheet

Ohmmu Adventure Series H8 / Group 49 — 100Ah Sodium 12V
Chemistry	Sodium-ion
Capacity	100Ah
Cold cranking amps	2,000+
Operating range	-40°F to 172°F
Dimensions	355 x 175 x 190 mm (12 x 6.9 x 7.5 in)
Weight	29 lb
Terminals	SAE, positive top back left
Fits	H8 / Group 49, incl. Ineos, Jeep, Lexus, Nissan, Toyota
Warranty	4 years, full replacement on performance failure
Install guide	Coming soon

The Balance

Pros & Cons

Pros

Operates from -40°F to 172°F.
2,000+ CCA starting power.
Tolerates being drained to 0V.
Cheaper than the lithium options at $549.
4-year full replacement warranty.

Cons

Heavier than lithium at 29 lb.
No built-in Bluetooth; monitor is an optional $30 add-on.
Install guide is still marked coming soon.
Sodium-ion is newer, so there is less long-term track record.

FAQ

Answers before you buy

Is sodium better than lithium?

For extreme heat and cold, Ohmmu says yes. Lithium is lighter and has built-in monitoring on some models.

Can I fully discharge it?

Ohmmu says you can drain it to 0V and recharge without cell damage.

What vehicles fit?

Those using H8 or Group 49 batteries, including Ineos, Jeep, Lexus, Nissan and Toyota models.

How do I monitor it?

Via the optional Ancel BM200 monitor.

What is the warranty?

4 years, 100% full replacement on performance failure, determined by Ohmmu after inspection.

4.2/5

Overall Score

The tough-weather pick

If you live where it gets very hot or very cold, this is the one to look at. Editorial score, not customer ratings.

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Last updated: October 5, 2026 · Reviewed by the Teelacodes Editorial Team.