33140 LiFePO4 Battery 3.2V 15Ah | EVE C33 / Gotion IFR32135 Grade-A Cell

33140 LiFePO4 Battery — 15Ah 3.2V Cylindrical LFP Cell (EVE C33 / Gotion IFR32135)

The 33140 LiFePO4 battery is the 15Ah class of the cylindrical LFP ladder: Ø33 × 140 mm, 15 Ah at 3.2 V nominal — 48 Wh per cell, two and a half times the energy of a 6Ah 32700 in one can. The “33140” designation covers the Gotion and EVE side of a dual naming standard: Gotion’s official model is IFR32135-15Ah and EVE’s is the C33, both sold across the channel as 33140. CMX Battery supplies both lines as Grade-A cells with per-lot capacity, IR and OCV test data, UN 38.3 / IEC 62619 / CE / MSDS documentation, MOQ 100 pcs and 15-day lead time — with specification review to match the right line to your program.

Table of contents: Specifications · Brand Options · What Is a 33140 LiFePO4 Battery? · 33140 vs 32140 · Pack Economics · Charge & Discharge · Cycle Life & Safety · Applications · Certifications · OEM/ODM & Ordering · FAQ

33140 LiFePO4 Battery Specifications

Typical values below reflect published manufacturer specifications for the two supply lines; final parameters ship against the CMX controlled product specification.

† Derived from published energy and weight.

Brand Options: EVE C33 vs Gotion IFR32135-15Ah

Both lines are the same envelope and electrically interchangeable in most designs; the choice is cycle life versus temperature window.

What Is a 33140 LiFePO4 Battery?

A 33140 LiFePO4 battery is a rechargeable cylindrical cell — 33 mm nominal diameter, 140 mm length, 15 Ah at 3.2 V — in the naming convention where Gotion and EVE publish the format. Its sibling designation, 32140, covers the same envelope under CBAK and Lithium Werks; the split follows the manufacturer, not a physical incompatibility. The full dual-standard analysis is in our 32140 vs 33140 comparison.

The format’s engineering case is cell count: a 51.2 V / 15 Ah pack is 16 cells (16S1P) in the 15Ah class versus 48 cells (16S3P) in the 6Ah class — with proportional reductions in welds, busbars, BMS sampling points and assembly labor.

33140 vs 32140: Same Envelope, Different Brands

In most ESS and telecom designs either side works; specify by manufacturer model code (C33, IFR32135-15Ah, AER32140m2A1) rather than the size name. See the 32140 product page for the CBAK / Lithium Werks side.

Pack Economics: Why the 15Ah Format Cuts Cell Count by Two-Thirds

For a pack builder running volume, that difference lands directly in cost of goods: fewer welds, fewer busbars, fewer BMS channels, less assembly labor. The trade-off is flexibility — a 16S3P 6Ah design can be re-configured by changing parallel count, while a 16S1P 15Ah design is locked to its capacity step. Step-by-step configuration math is in our pack configuration guide.

IFR33140 Charge and Discharge Profile

Charging follows CC-CV on the LFP profile to a 3.65 V ceiling — never 4.2 V. Standard rates are 0.5C (7500 mA) on the EVE C33 and 0.2C (3 A) stepped up to 1.2C on the Gotion IFR32135. The Gotion line’s −20 °C charge floor is the widest published in the format and removes the need for pack-level heating in most cold-climate designs — a system-cost argument that outweighs a headline cycle-life difference.

Discharging is rated 1C (15 A) standard on the Gotion cell with 3C (45 A) DCR-tested pulses, and 0.5C standard with a 3C maximum on the EVE C33. The ≤3 mΩ class internal resistance keeps voltage sag low under load; for sustained 2C+ duty, verify the rate table on the specific line’s datasheet.

IFR33140 Cycle Life and Safety Performance

Cycle life leads the format on the EVE side: 4,000 cycles at 25 °C (1,500 at 45 °C), against ≥2,500 cycles to 80% retention at 25 °C on the Gotion IFR32135. For a stationary system living at 20–30 °C, both meet a 10-year daily-cycle profile; for high-temperature installations, the 45 °C rating is the number to compare.

Safety testing covers over-discharge, overcharge, external short circuit, thermal abuse, drop, vibration and temperature shock — all with no fire, no explosion, no leakage. The LFP chemistry’s higher thermal runaway onset temperature removes the propagation concern in multi-cell series configurations.

33140 LiFePO4 Battery Applications

Stationary ESS (C&I and residential). 16S1P blocks deliver 51.2 V / 15 Ah from 16 cells; 16S7P builds 51.2 V / 100 Ah from 112 — the format’s core value proposition.

Telecom backup. Gotion’s −20 °C charge / −30 °C discharge window suits unheated cabinets in cold climates; factory QR traceability simplifies warranty administration.

AGV, UPS and light EV. 3C-class pulse capability covers drive and transfer currents; the 15Ah class halves the BMS channel count of a 6Ah build.

Certifications and Shipping Compliance

Every 33140-class cell ships against the documentation compliance teams ask for first: UN38.3 (the UN Manual of Tests and Criteria test summary required for lithium transport by air and sea), MSDS, IEC 62619 industrial storage safety compliance, and CE declaration. The Gotion IFR32135 line additionally holds GB 38031 with factory QR traceability and a three-year warranty; the EVE C33 ships with CE, RoHS and UN38.3. Lot-level documentation — capacity, internal resistance and open-circuit voltage per cell — accompanies each shipment.

OEM/ODM Customization and Ordering

CMX Battery supplies EVE C33 and Gotion IFR32135-15Ah cells as a Grade-A cells supplier for OEM programs: welded tabs or connectors to your drawing, shrink-wrap or label branding with your model number, BMS integration for pack orders from 12 V to 51.2 V, and packaging configured to your line. Cells ship at partial SOC with per-lot test data. MOQ 100 pcs, samples available, 15-day lead time; minimum order quantities and lead times are confirmed with your quotation, which comes back within 24 hours. Warranty is one year from date of shipment against manufacturing defects, alongside the manufacturer warranty where applicable.

Frequently Asked Questions

What is a 33140 LiFePO4 battery?
A 33140 LiFePO4 battery is a rechargeable cylindrical LFP cell — Ø33 × 140 mm, 15 Ah at 3.2 V nominal (≈48 Wh) — the designation used by Gotion (model IFR32135-15Ah) and EVE (model C33) for the 15Ah cylindrical format.

Is Gotion IFR32135 the same as a 33140?
Yes. Gotion’s official model code is IFR32135-15Ah; the cell is widely distributed as the “33140” because its measured diameter (Ø33.6 mm) matches the 33 mm naming convention. The datasheet, not the size name, defines the cell.

What is the difference between 33140 and 32140?
Same 15Ah envelope, different manufacturers: 33140 covers Gotion and EVE lines; 32140 covers CBAK and Lithium Werks. They are drop-in substitutes in most pack designs — verify holder clearance, discharge-rate rating and charge-temperature window before substituting.

What is the cycle life of a 33140 LiFePO4 cell?
EVE C33 is rated 4,000 cycles at 25 °C (1,500 at 45 °C); Gotion IFR32135-15Ah holds ≥2,500 cycles to 80% retention at 25 °C. Compare at your operating temperature rather than the headline 25 °C figure.

How many 33140 cells for a 51.2V 15Ah battery?
16 cells (16S1P): a 51.2 V nominal pack needs 16 cells in series at 3.2 V per cell, and the 15Ah format needs no parallel strings. The same pack in 6Ah 32700 cells requires 48 cells (16S3P).

Can a 33140 charge in cold weather?
The Gotion IFR32135-15Ah supports charging from −20 °C and discharging to −30 °C — the widest published window in the format, and the reason cold-climate programs specify this line. EVE C33 charge limits follow its datasheet.

Is the 33140 available for OEM programs?
Yes — welded tabs or connectors, custom labels with your model number, BMS integration and tailored packaging are standard services, with per-lot test data on every shipment. MOQ 100 pcs, 15-day lead time.

Request a Quote

Send your target voltage, capacity, continuous current and installation environment — you will receive a datasheet-matched quotation, sample options and lead time within 24 hours.

Or email sales@cmxbattery.com. Download the typical specifications overview: IFR33140 Typical Specifications Overview (PDF). The controlled product datasheet is issued with your quotation on request.