Deep Cycle LiFePO4 Batteries

Deep-cycle means discharge and recharge every day — CMX Battery builds LiFePO4 packs for exactly that, with 80–90% usable DoD and thousands of cycles where lead-acid would quit.

Overview

A deep-cycle battery is rated to be discharged deeply and recharged repeatedly; that is the normal life of solar, mobility and equipment banks. LiFePO4 is the right chemistry because it tolerates 80–90% depth of discharge for 2,000–5,000 cycles, where lead-acid is ruined by anything past 50%. CMX Battery builds deep-cycle packs at 12V/24V/48V with an integrated BMS and the enclosure your duty needs. The buying point is simple: size to daily kWh at the high usable DoD, and the bank pays for itself in cycle life.

Key specifications

Specification	Value	Why it matters
DoD	80–90% usable	vs 50% for lead-acid.
Cycle life	2,000–5,000 cycles	Daily cycling for years.
Voltage	12.8 / 25.6 / 51.2V	Per application.
BMS	Integrated, full protection	Deep-cycle rated.
Chemistry	LiFePO4	Safe, long-cycle.

Typical applications

Solar and off-grid: Daily cycling.
Mobility: RV, marine, cart.
Equipment banks: 24V/48V duty.
Backup: Repeated discharge.

How to specify & buying guide

Size Ah from daily kWh ÷ voltage at 80–90% DoD, not lead-acid's 50%.
Use a charger/controller with an LiFePO4 profile.
Match BMS current to peak load (motor starts, inverters).
Parallel only identical packs with equal cabling.

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 deep can I discharge it?

80–90% DoD routinely; lead-acid would be damaged past 50%.

How many cycles?

2,000–5,000 at the defined DoD and temperature.

Is it better than AGM?

Far deeper DoD and 3–5× the life, at higher upfront cost.

What voltage should I pick?

12V small, 24V mid, 48V once loads pass a few kW.

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.