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IFR32140 Batteries – Large-Format LiFePO₄ Cylindrical Cells, Ultimate Safety, Ultra-Long Cycle Life for Deep-Cycle Energy Storage
Welcome to our IFR32140 Batteries collection. The IFR32140 lithium iron phosphate (LiFePO₄) cell (approx. 32mm diameter × 140mm length) is a large-format cylindrical power source purpose‑engineered for applications where safety, longevity, and stable voltage delivery outweigh raw energy density. By adopting the inherently stable olivine crystal structure, IFR32140 cells are virtually immune to thermal runaway — no fire, no explosion under nail penetration, overcharge, or short-circuit abuse. Typical capacities range from 10,000mAh to 20,000mAh, with high‑power variants supporting 1C–3C continuous discharge (15A–60A). These cells are the definitive choice for solar street lighting, off‑grid & RV energy storage, portable power stations, marine house banks, electric two‑ and three‑wheelers, medical equipment, and any installation where the battery lives near people.
Core Advantages of IFR32140 Batteries
- Intrinsically Safe Chemistry: LiFePO₄ olivine structure strongly binds oxygen, refusing to release it even under extreme abuse. Nail penetration, overcharge, and dead‑short tests consistently result in venting without ignition, making IFR32140 the safest lithium chemistry for occupied spaces.
- Ultra‑Long Cycle Life: Engineered for deep‑cycle service, quality IFR32140 cells deliver 2,000–6,000+ charge/discharge cycles (≥80% capacity retention), effectively outlasting the equipment they power and dramatically lowering total cost of ownership.
- Large Single‑Cell Capacity: With 10Ah–20Ah in a single cylindrical can, a 4S IFR32140 pack provides a 12.8V battery with 128Wh–256Wh — enough to run a campsite refrigerator overnight or power a solar street light for multiple nights autonomously.
- Stable 3.2V Discharge Plateau: Nominal 3.2V (full charge 3.65V) with an exceptionally flat discharge curve means connected equipment receives consistent voltage until near‑complete depletion, eliminating the voltage‑sag headaches of lead‑acid alternatives.
- Rugged Mechanical Construction: The sturdy 32mm × 140mm stainless‑steel can withstand vibration, shock, and outdoor thermal cycling, making IFR32140 ideally suited for solar light poles, marine engine compartments, and mobile field equipment.
- No Cobalt, Low Environmental Impact: Cobalt‑free cathode chemistry eliminates supply‑chain ethical concerns and makes end‑of‑life recycling simpler and more economical.
- Wide Temperature Tolerance: Safe discharge from -20°C to 60°C allows deployment in harsh environments without active thermal management, from Arctic solar stations to desert telecom enclosures.
IFR32140 vs. 32650 vs. 26650 vs. 21700 – Key Comparison
| Parameter | IFR32140 | 32650 (LiFePO₄) | 26650 (LiFePO₄) | 21700 (NMC) |
|---|---|---|---|---|
| Dimensions | ~32mm × ~140mm | ~32mm × ~65mm | ~26mm × ~65mm | ~21mm × ~70mm |
| Volume (approx.) | 112.6 cm³ | 52.3 cm³ | 34.5 cm³ | 24.2 cm³ |
| Typical Capacity Range | 10,000mAh – 20,000mAh | 5,000mAh – 7,000mAh | 2,500mAh – 5,000mAh | 3,000mAh – 5,800mAh |
| Nominal Voltage | 3.2V (LiFePO₄) | 3.2V (LiFePO₄) | 3.2V (LiFePO₄) | 3.6V–3.7V (NMC) |
| Energy (Wh) | 32Wh – 64Wh | 16Wh – 22Wh | 8Wh – 16Wh | 10Wh – 21Wh |
| Continuous Discharge | 1C – 3C (e.g., 15A–60A) | 1C – 5C | 1C – 3C | 10A – 45A (high‑drain NMC) |
| Cycle Life | 2,000 – 6,000+ cycles | 2,000 – 4,000 cycles | 2,000 – 4,000 cycles | 300 – 800 cycles |
| Key Strengths | Highest per‑cell energy, unmatched safety, longest life | Rugged, widely available | Compact, low‑cost LiFePO₄ | Highest energy density, compact |
| Typical Applications | Solar lights, RV/off‑grid storage, marine, medical | Power tools, UPS, solar packs | Flashlights, portable storage, e‑bikes | EVs, power tools, vaping, flashlights |
Popular IFR32140 Cell Models – Quick Reference
| Model | Brand | Chemistry | Nominal Capacity | Nominal Voltage | Continuous Discharge | Positioning |
|---|---|---|---|---|---|---|
| IFR32140-15Ah | EVE | LiFePO₄ | 15,000mAh | 3.2V | 1C (15A) | Industry‑standard benchmark; solar & telecom |
| IFR32140-15Ah-3C | EVE | LiFePO₄ | 15,000mAh | 3.2V | 3C (45A) | High‑power LiFePO₄; electric vehicles & power tools |
| IFR32140-20Ah | Lishen | LiFePO₄ | 20,000mAh | 3.2V | 1C (20A) | Maximum capacity; portable power & RV storage |
| IFR32140-12.5Ah | BatterySpace / OEM | LiFePO₄ | 12,500mAh | 3.2V | 2C (25A) | Balanced performance; e‑bikes & marine trolling motors |
| IFR32140-10Ah | Various | LiFePO₄ | 10,000mAh | 3.2V | 1C (10A) | Cost‑effective; solar garden lights & small UPS |
Typical Specifications Range (IFR32140)
| Parameter | Typical Range |
|---|---|
| Nominal Voltage | 3.2V (LiFePO₄ chemistry) |
| Full Charge Voltage | 3.65V ±0.05V (strictly use LiFePO₄ charger) |
| Capacity Range | 10Ah – 20Ah (10,000mAh – 20,000mAh) |
| Continuous Discharge Current | 1C – 3C (e.g., 10A – 60A, model dependent) |
| Internal Resistance (AC 1kHz) | ≤6mΩ – 15mΩ (large format lowers IR) |
| Cycle Life | 2,000 – 6,000+ cycles (≥80% retention, 0.5C/1C charge/discharge) |
| Energy Density | Approx. 100–140 Wh/kg |
| Operating Temperature | Charge: 0°C~45°C / Discharge: -20°C~60°C |
| Dimensions | Diameter 31.5mm–32.5mm × Length 139mm–141mm |
| Weight | Approx. 270g – 310g (varies by capacity) |
Typical Applications
| Application | Recommended Type | Suggested Models | Why IFR32140 |
|---|---|---|---|
| Solar Street / Garden Lights | Standard Capacity | EVE 15Ah, IFR32140-10Ah | Ultra‑long cycle, withstands daily deep cycling, maintenance‑free |
| Off‑Grid / RV / Marine Energy Storage | High Capacity | Lishen 20Ah, EVE 15Ah | Intrinsic safety – no thermal runaway risk in confined living spaces |
| Portable Power Stations | High Capacity / Balanced | EVE 15Ah, Lishen 20Ah | 4S pack delivers true 12V platform; fewer cells, simpler BMS |
| E‑bike / E‑trike / Scooter Packs | High‑Power | EVE 15Ah-3C, IFR32140-12.5Ah | High discharge current, superior safety over NMC pouch cells |
| Medical Devices / Hospital Equipment | Standard / Balanced | EVE 15Ah, IFR32140-12.5Ah | Zero‑risk chemistry for patient‑adjacent applications |
| Telecom Backup / Remote Monitoring | Standard Capacity | EVE 15Ah | Wide temperature range, 10+ year design life |
| DIY 12V/24V Battery Banks | All Types | EVE 15Ah, Lishen 20Ah | Threaded or nickel‑tab options; easy to assemble with busbars |
How to Choose the Right IFR32140 Battery?
| Your Requirement | Recommended Type | Suggested Model |
|---|---|---|
| I need maximum runtime for solar lights or small off‑grid systems | High Capacity | Lishen 20Ah, EVE 15Ah |
| I need higher discharge current for an e‑bike or power tool | High‑Power | EVE 15Ah-3C (45A) |
| I want the safest possible chemistry for an RV or boat house bank | Standard LiFePO₄ | EVE 15Ah, IFR32140-12.5Ah |
| I’m building a custom pack and need matched cells in bulk | Contact our engineering team | — |
⚠️ IFR32140 Battery Safety Guidelines
- Use Only LiFePO₄‑Specific Chargers: IFR32140 cells have a maximum charge voltage of 3.65V. Charging with a standard 4.2V Li‑ion charger will permanently damage the cell and may cause swelling. Always verify that your charger or BMS is set to the LiFePO₄ profile.
- Never Mix Chemistries: IFR32140 (3.2V) cells must never be connected in series or parallel with NMC/NCA (3.6V–3.7V) cells. Different voltage platforms and charge profiles create dangerous imbalances.
- Avoid Over‑Discharge: Disconnect load when cell voltage reaches 2.5V–2.8V. Recharge promptly; prolonged storage at deeply discharged states causes irreversible capacity loss.
- Prevent Mechanical Stress: Do not dent, crush, or puncture the cell can. Though LiFePO₄ is highly resistant to thermal runaway, physical damage can still create internal short circuits.
- Insulate Terminals Properly: When assembling packs, ensure nickel strips, busbars, or wires cannot short the positive terminal to the cell can (which is negative). Use insulating rings and fish paper as barriers.
- Recycle Responsibly: Even LiFePO₄ cells should be disposed of at certified battery recycling facilities. Never discard in household waste or incinerate.
Why Choose Our IFR32140 Batteries?
- Genuine Grade‑A Cells: Direct procurement from EVE, Lishen, and other Tier‑1 LiFePO₄ manufacturers. Every cell is factory‑fresh with full capacity — zero recycled, zero B‑grade, zero rewraps.
- 100% Capacity & IR Tested: Each shipment undergoes strict capacity grading, internal‑resistance screening, and voltage sortation. Matched cells with less than 1% capacity deviation and ±0.5mΩ IR tolerance are available for pack assembly.
- Complete LiFePO₄ Portfolio: From 10Ah to 20Ah, standard to high‑power 3C variants — all IFR32140 needs covered under one roof.
- Flexible Terminal Options: Cells available in flat top, button top, pre‑welded nickel tabs, and protected with wire leads — all genuine factory‑applied, not aftermarket modifications.
- Ready‑to‑Ship Documentation: UN38.3 test reports, MSDS, and CE/RoHS compliance documents provided to streamline your international shipping and customs clearance.
- Expert Pack Design Support: Our engineering team can assist with cell selection, series/parallel layout, busbar design, BMS integration, and laser‑welded pack prototyping — whether you need 10 packs or 10,000.
👇👇👇 Browse the product list below and filter by capacity or discharge current to find the perfect IFR32140 cell for your solar light, RV, marine, or industrial project. For volume quotes, custom pack solutions, or technical consultation, reach out to our engineering team directly.
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