Low Temperature Lithium Batteries

Standard LiFePO4 loses capacity and risks damage in the cold — CMX Battery's low-temperature cells hold capacity and discharge safely well below freezing for winter-duty applications.

Overview

CMX Battery low-temperature batteries use cell chemistry and electrolyte tuned to retain capacity and discharge safely down to about −20°C to −30°C, where a standard LFP would sag hard or refuse to charge. They are for discharge-duty in the cold — outdoor equipment, cold storage, winter off-grid — not for charging below 0°C, which still needs a self-heating variant. We specify low-temperature cells where the duty is cold discharge and keep self-heating for cold charge, so you pay only for what the application needs.

Key specifications

Specification	Value	Why it matters
Temperature	Discharge to ≈−20°C to −30°C	Cold-duty chemistry.
Capacity retention	Holds far more than standard LFP in cold	Winter performance.
Voltage	12.8 / 25.6 / 51.2V	Per application.
Chemistry	Low-temp LiFePO4	Tuned electrolyte.
Note	Charging below 0°C still needs heating	Pair with self-heating if charging cold.

Typical applications

Cold storage: Constant cold duty.
Outdoor equipment: Winter operation.
Winter off-grid: Cold discharge.
Arctic/RV solar: Low-temperature banks.

How to specify & buying guide

Pick low-temp cells for cold discharge; add self-heating only if the pack is also charged below 0°C.
Confirm the low-temperature limit your duty actually needs (don't over-spec).
Keep the BMS temperature limits aligned with the cell rating.
Size capacity with cold retention in mind — even low-temp cells lose some capacity at the extreme.

Engineering & manufacturing at CMX Battery

Our modules pair matched LiFePO4 cells with a purpose-built BMS, busbars and mechanical enclosure. We design for the thermal and vibration profile of the application — stationary rack, wall mount or mobile pack — and validate the assembly on capacity, IR balance and thermal runaway margin before it ships.

Certifications & compliance

UN38.3 — Mandatory lithium battery transport test (altitude, thermal, vibration, shock, external short). Required for any cross-border shipment.
IEC62619 — International safety standard for industrial Li-ion cells and batteries; expected by EU and most APAC buyers.
CE — EU declaration of conformity for the applicable directives.
RoHS — Restriction of hazardous substances in the battery and BMS.
IP65 — Dust-tight and low-pressure water-jet resistant — suitable for outdoor enclosures.

Frequently asked questions

How cold can it discharge?

Down to about −20°C to −30°C depending on the cell, holding far more capacity than standard LFP.

Can it charge in the cold?

Discharge yes; charging below 0°C still needs a self-heating variant.

Low-temp or self-heating?

Low-temp for cold discharge; self-heating for cold charge — sometimes both.

Is it more expensive?

Yes, tuned cells cost more; we spec it only where the duty needs it.

Request a quote

Send us your voltage, capacity, dimensions, certification target and annual volume. Our engineering team returns a proposal within three working days. Start your RFQ or review our custom pack capabilities.