GEB 26700 3.2V 4000mAh Cylindrical LiFePO4 Battery Cell (26×70mm)
Grade-A GEB 26700 3.2V 4000mAh cylindrical LiFePO4 battery cell (26×70mm, Approx. 93g, 12.8Wh) featuring 2,000+ cycles, 5C continuous discharge, and UN38.3 compliance for energy storage, solar lighting, and electric mobility.
B2B Engineering Review & Pricing
Direct manufacturer supply, custom BMS telemetry, and CAD fit validation for OEM/ODM projects.
Product Details
The GEB 26700 3.2V 4000mAh Cylindrical LiFePO4 Battery Cell (26×70mm) is an industrial-grade Lithium Iron Phosphate (IFR26700) power cell delivering a verified 3.2V nominal working voltage and 4,000mAh rated capacity (12.8Wh energy). Engineered for severe thermal endurance and long service life (≥ 2,000–3,500 cycles at 80% DoD), this cell features high intrinsic safety with zero thermal runaway propagation under physical crush or overcharge abuse. Rated for 3C–5C continuous discharge (12A–20A) and 10C burst pulses (40A ≤ 10s), it provides a stable 3.2V voltage plateau for commercial energy storage, solar street illumination, AGVs, and low-speed electric mobility.
Product Overview
The GEB 26700 3.2V 4000mAh Cylindrical LiFePO4 Battery Cell is manufactured to precision electrochemical tolerances within an automated cylindrical production line. Enclosed in a heavy-duty nickel-plated steel can with an integrated explosion-proof safety vent and PTC current limiter, it operates safely under harsh ambient conditions up to 60°C. Measuring Ø 26.2 × 70.0 mm and weighing Approx. 93g, the 26700 form factor provides enhanced volumetric energy density over conventional 26650 cells while maintaining standard module width tooling. Each batch undergoes rigorous automated impedance and open-circuit voltage sorting (ΔV ≤ 3mV, ΔR ≤ 1.5mΩ) to guarantee exceptional pack-level balance.
Product Specifications
| Feature / Attribute | Technical Specification |
|---|---|
| Battery Chemistry | Lithium Iron Phosphate (LiFePO4 / IFR26700) |
| Nominal Voltage & Capacity | 3.2V / 4000mAh (12.8Wh) |
| Physical Dimensions | Ø 26.2 ± 0.2 mm × H 70.0 ± 0.5 mm |
| Cell Weight | Approx. 93 g (±2g) |
| Continuous Discharge Rating | 3C–5C (12A–20A continuous discharge) |
| Peak Pulse Discharge | 10C Peak Pulse (40A ≤ 10s) |
| Terminal Form Factor | Flat Top / Optional Spot-Welded Pure Nickel Tabs |
| Target Applications | Commercial ESS modules, solar street lights, automated guided vehicles (AGV), electric sweepers |
| Service Life / Endurance | ≥ 2,000–3,500 cycles (@ 80% DoD, 25°C) |
Technical Specifications
| Parameter | Value | Test Conditions & Engineering Tolerances |
|---|---|---|
| Nominal Operating Voltage | 3.2V | Standard measurement @ 25°C, 0.2C rate |
| Upper Voltage / Charge Cutoff | 3.65V ± 0.03V | CC/CV mode, 0.02C termination current |
| Discharge Lower Cutoff | 2.50V ± 0.05V | Safety lower voltage threshold (absolute limit 2.0V) |
| Standard Charge Current | 0.5C (2000mA) | Full charge in approx. 2.5 hours |
| Maximum Charge Current | 1.0C (4000mA) | Rapid CC/CV charging regime |
| Internal AC Resistance (1kHz) | ≤ 15–22 mΩ | 1kHz AC test @ 25°C fully charged state |
| Operating Temperature Range | Charge: 0~45°C | Discharge: -20~60°C | Storage: -10~35°C (50% SoC recommended) |
Integration & Operational Boundary Conditions
BMS Setting Guidelines: When assembling into series/parallel battery packs, configure individual cell over-voltage protection (OVP) at 3.65V and under-voltage protection (UVP) at 2.50V. Cell balance activation is recommended at ≥ 3.40V during the constant voltage CV charging phase.
Sub-Zero Charging Restrictions: Never charge the cell below 0°C at currents exceeding 0.05C without pre-heating, as metallic lithium plating may occur. Discharge is fully qualified down to -20°C with nominal capacity retention exceeding 70%.
Welding & Assembly SOP: Always utilize dual-pulse spot welding with pure nickel strips (≥ 0.15mm thickness). Direct soldering on positive/negative terminal caps with hand soldering irons is strictly prohibited to prevent heat degradation of the top seal gasket.
Equipment Compatibility & Engineering Fit Check
Before deploying GEB 26700 3.2V 4000mAh Cylindrical LiFePO4 Battery Cell (26×70mm), verify these verified electrical and mechanical boundary requirements:
Operational Boundary Conditions
✔ Recommended Fit & Use Cases:
- Electronic devices and OEM packs matched with 3.2V / 4Ah power curves.
- Commercial designs requiring high volumetric energy density and predictable discharge curves.
- Projects requiring batch consistency with automated barcode impedance sorting.
⚠ Operational Constraints & Limits:
- Do not discharge below minimum cutoff voltage or charge beyond 3.65V.
- Maintain operational surface temperature within -20°C to +60°C discharge (0°C to +45°C charge).
- Ensure connector polarity and pin assignment match system schematics prior to initial power-up.
First-Party Manufacturing SOP & Export Compliance
Technical Whitepapers & Engineering Guides
High-Performance Cylindrical Batteries: 16 Years of B2B Manufacturing
Technical breakdown of automated cell sorting, delta IR matching, laser welding busbars, and cycle aging protocols.
Industrial Cylindrical Batteries: QC, Aging and Test Standards
Key factory inspection criteria for cylindrical packs, thermal management, vibration testing, and BMS protection thresholds.
Cylindrical Battery Sourcing: Capacity and QC Verification Guide
How hardware engineers evaluate true C-rate capability, temperature rise curves, and Grade-A barcode traceability.
