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LiFePO₄ (3.2V) Battery & Charger – Ultra-Safe, Ultra-Long Cycle Life Lithium Iron Phosphate Cells + Dedicated 3.65V Smart Chargers for Solar, Medical & Energy Storage
Welcome to our LiFePO₄ (3.2V) Battery & Charger collection. Lithium Iron Phosphate (LiFePO₄) chemistry stands as the gold standard for safety and longevity. Unlike standard 3.7V NMC batteries, LiFePO₄ cells operate on a 3.2V nominal platform and require a strictly limited 3.65V full-charge cut-off. Attempting to charge a LiFePO₄ cell with a standard 4.2V Li-ion charger will cause overcharge damage, swelling, and severe safety hazards. This collection offers a full range of genuine Grade-A LiFePO₄ cells (IFR18650, IFR21700, IFR26650, IFR32700, IFR32140) alongside dedicated 3.65V LiFePO₄ chargers (or multi-chemistry chargers with a precise LiFePO₄ mode). Whether for solar energy storage, medical equipment, UPS backup systems, or 12V/24V lead-acid replacement, you will find the safest, longest-lasting power solution right here.
Core Advantages of 3.2V LiFePO₄ Batteries
- Inherently Safe – No Thermal Runaway: The olivine crystal structure of LiFePO₄ strongly binds oxygen. It passes nail penetration, overcharge, and short-circuit tests without igniting or exploding, making it the safest choice for indoor, personal, or unattended installations.
- Ultra-Long Cycle Life: Rated for 2,000 to 5,000+ full cycles (≥80% capacity retention). This translates to a service life 3 to 10 times longer than standard NMC cells, dramatically reducing lifetime replacement costs in stationary storage.
- Flat 3.2V Discharge Curve: Maintains a consistent 3.2V output throughout the majority of the discharge cycle, delivering stable voltage to your device until near-full depletion—no voltage droop.
- Wide Operating Temperature: Performs reliably from -20°C to 60°C during discharge, with excellent high-temperature tolerance unmatched by standard Li-ion.
- Low Self-Discharge: Loses only 2–3% charge per month in storage, making IFR cells ideal for emergency backup equipment and seasonal-use devices.
- Environmentally Friendly: Contains no cobalt and no toxic heavy metals—one of the most sustainable lithium-ion chemistries available.
Core Advantages of Dedicated LiFePO₄ Chargers (3.65V Cut-off)
- Precision 3.65V CC/CV Charging Profile: Engineered specifically for LiFePO₄, these chargers use a Constant Current (CC) phase followed by a Constant Voltage (CV) phase that terminates strictly at 3.65V ±0.05V. This is critical to prevent gassing and swelling of the cell.
- Smart Over-Discharge Recovery: Select professional LiFePO₄ chargers can detect deeply discharged cells (down to 2.0V) and safely attempt to reactivate them using a low-current pre-charge mode before the standard CC/CV cycle.
- Wide Size Compatibility: LiFePO₄ cells often come in larger formats (26650, 32700, 32140). These chargers feature extended slider travel and robust spring tension to securely hold longer and wider cells.
- Independent Charging Channels: Multi-bay chargers control each slot independently—you can charge multiple LiFePO₄ cells of different sizes without mutual interference.
- Multiple Safety Protections: Built-in overcharge, over-discharge, overcurrent, short-circuit, reverse polarity, and overheat protection for comprehensive safety.
- LCD Digital Display: Real-time monitoring of charging voltage, current, charged capacity, and internal resistance—providing full transparency and peace of mind.
3.2V LiFePO₄ vs. 3.7V Li-ion vs. 1.2V NiMH – Charging & Spec Comparison
| Parameter | 3.2V LiFePO₄ (This Collection) | 3.7V Li-ion (NMC/NCA) | 1.2V NiMH |
|---|---|---|---|
| Nominal Voltage | 3.2V | 3.6V – 3.7V | 1.2V |
| Full Charge Cut-off Voltage | 3.65V ±0.05V (Critical) | 4.2V ±0.05V | 1.45V – 1.5V |
| Typical Capacity (18650) | 1100mAh – 1600mAh | 1500mAh – 3500mAh | 600mAh – 2800mAh |
| Typical Capacity (21700) | 1800mAh – 3000mAh | 3000mAh – 5800mAh | — |
| Cycle Life | 2,000 – 5,000+ cycles | 500 – 1,000 cycles | 500 – 2,100 cycles |
| Safety Profile | Excellent (Inherently safe) | Good (Requires protection) | Good |
| Best For | Solar storage, medical, safety-critical systems | High-energy/high-drain portable devices | High-drain household daily use |
Popular LiFePO₄ Battery & Charger Models – Quick Reference
| Category | Model/Spec | Features |
|---|---|---|
| IFR18650 | EVE IFR18650-1500 | 1500mAh / 3A, safe LiFePO₄ chemistry for solar & medical |
| IFR21700 | EVE IFR21700-30E | 3000mAh / 10A, high-capacity LiFePO₄ for portable power stations |
| IFR26650 | EVE IFR26650-33A | 3300mAh / 10A, ideal for solar street lights and 12V lead-acid replacement |
| IFR32700 | EVE IFR32700-6AH | 6000mAh / 30A (HP), high-power LiFePO₄ for industrial/AGV applications |
| IFR32140 | Lishen IFR32140-15Ah | 15000mAh, massive single-cell capacity for off-grid RV storage |
| 4-Bay Multi-Chemistry | XTAR VC4 / VC4S | Supports LiFePO₄ 3.65V mode, LCD display, wide size compatibility up to 32700 |
| 4-Bay Smart Charger | Nitecore D4 / New i4 | Independent channels, auto-detection, manual LiFePO₄ 3.65V mode |
| 4-Bay Analyzer | XTAR VX4 V2 | Manual 3.65V LiFePO₄ mode, capacity & IR testing function for pack matching |
Typical Specifications Range (LiFePO₄ Battery & Charger)
| Parameter | LiFePO₄ Battery | Compatible Charger |
|---|---|---|
| Nominal Voltage | 3.2V | Auto-detection / 3.65V mode |
| Full Charge Voltage | 3.65V ±0.05V | 3.65V ±0.05V (Precision cut-off) |
| Capacity Range | 500mAh – 20,000mAh (depends on format) | — |
| Continuous Discharge | 3A – 30A+ (model dependent) | — |
| Input Voltage | — | USB 5V / Type-C / DC 12V |
| Charge Current | — | 0.25A – 3A (adjustable/adaptive) |
| Size Compatibility | 18650 / 21700 / 26650 / 32700 / 32140 | 18650/21700/26650/32700 and more |
Typical Applications
| Application | Recommended Battery Type | Recommended Charger |
|---|---|---|
| Solar street lights / Off-grid storage | IFR26650 / IFR32700 (High Capacity) | 4-bay LiFePO₄ charger (e.g., XTAR VC4, Nitecore D4) |
| UPS backup / Medical devices | IFR18650 / IFR21700 (Protected) | 2-bay smart charger with 3.65V mode |
| 12V / 24V Lead-acid replacement packs | 4S (12.8V) / 8S (25.6V) LiFePO₄ matched packs | Multi-cell pack balancing charger system |
| Security systems / Emergency lighting | IFR18650 / IFR26650 | 2/4-bay digital charger with LiFePO₄ mode |
How to Choose the Right LiFePO₄ Battery & Charger?
| Your Requirement | Recommended Battery Type | Recommended Charger |
|---|---|---|
| I need maximum runtime for solar storage or 12V packs | Large format (IFR32700, IFR32140) / High Capacity | 4-bay charger with extended slider travel for 32mm cells |
| I need the ultimate safety for medical or home UPS systems | IFR18650 / IFR21700 (Protected or with BMS) | 2-bay smart charger with LiFePO₄ mode |
| I need to build a custom multi-cell pack and match IR/capacity | Bulk matched LiFePO₄ cells | Analyzer charger with capacity testing and LiFePO₄ mode |
| I need bulk quantities or custom pack solutions | Contact our sales team | — |
⚠️ LiFePO₄ Battery & Charger Critical Safety Guidelines
- Use ONLY a 3.65V LiFePO₄ Charger: This is the most critical rule. Never charge a 3.2V LiFePO₄ cell with a standard 4.2V Li-ion charger. It will overcharge the battery, causing permanent damage and swelling. If using a multi-chemistry charger, manually select the "LiFePO₄" or "3.65V" mode.
- Do Not Mix with Standard Li-ion Batteries: 3.2V LiFePO₄ and 3.7V Li-ion have completely different voltage profiles. Never mix them in the same device or series battery pack.
- Avoid Over-Discharge: Stop discharging when the voltage drops below 2.5V. Prolonged storage below 2.0V can cause permanent capacity loss despite LiFePO₄'s robust chemistry.
- Avoid Short Circuits and High Temperatures: Do not short the terminals. Keep away from fire, heat, and moisture.
- Discontinue if Damaged: Stop using cells with torn wraps, dents, or leakage. Recycle responsibly.
Why Choose Our LiFePO₄ Battery & Charger Collection?
- Genuine Grade-A Cells: Batteries sourced directly from EVE, Lishen, A123 Systems, and other Tier-1 LiFePO₄ manufacturers. Chargers from XTAR, Nitecore, and professional brands.
- Verified 3.65V Cut-off: Every charger in this collection is tested to ensure it terminates the cycle precisely at 3.65V, protecting your long-term investment.
- One-Stop Shopping: Cells, chargers, and accessories all in one place—save time and effort.
- Flexible Purchasing: Single-cell retail, multi-pack discounts, tiered bulk pricing, and custom pack assembly.
- Certified & Documented: UN38.3, MSDS, CE, RoHS documentation provided for seamless international shipping.
- Expert Technical Support: Guidance on cell selection, BMS integration, charger matching, and after-sales service.
👇👇👇 Browse the product list below to find the perfect LiFePO₄ (3.2V) Battery & Charger combo for your application. For volume quotes or custom pack solutions, please contact our engineering team.
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