GEB 18650 3.7V 3400mAh High-Capacity Cylindrical Lithium-ion Battery Cell (18×65mm)
Grade-A GEB 18650 3.7V 3400mAh 5C High-Rate Cylindrical Lithium-ion Battery Cell (18×65mm) (3.7V, 3400mAh) cylindrical battery with 18×65mm dimensions, low IR, and UN38.3 documentation for Electric bicycles, power tools, electric scooters, medical equipment, custom battery pack modules.
B2B Engineering Review & Pricing
Direct manufacturer supply, custom BMS telemetry, and CAD fit validation for OEM/ODM projects.
Product Details
The GEB 18650 3.7V 3400mAh High-Capacity Cylindrical Lithium-ion Battery Cell (18×65mm) is a professional-grade Grade-A cylindrical Lithium-ion (Li-ion) solution delivering a verified 3.7V nominal working voltage and 3,400mAh rated capacity (12.58Wh) with a standard continuous discharge capability of 1.5C (5.1A). Constructed with a high-integrity nickel-plated steel casing and integrated pressure-relief safety vents (CID/PTC), this high-energy-density cell features tight electrochemical grouping (ΔV ≤ 3mV, ΔR ≤ 1.5mΩ), making it ideal for IoT tracking nodes, outdoor LED lighting, portable medical telemetry, and custom energy-storage battery pack modules.
Product Overview
The GEB 18650 3.7V 3400mAh High-Capacity Cylindrical Lithium-ion Battery Cell (18×65mm) is an industrial-grade, premium energy-density cylindrical cell manufactured to strict electrochemical tolerances for high-reliability applications. Featuring a 3.7V nominal voltage and 3400mAh rated capacity (12.58Wh energy content), this cell incorporates a pressure-relief safety vent (CID/PTC for Li-ion), precision steel can packaging, and low internal impedance. With physical dimensions of Ø 18.3 ± 0.2 × H 65.0 ± 0.3 mm; unit weight is confirmed for the selected configuration. 46.5g ± 2.0g, it is engineered for smart IoT devices, tactical flashlights, portable electronics, and high-capacity custom battery packs. Before module assembly, verify spot-welding pure nickel tab thickness, cell spacing holders, and charger cutoff calibration.
Product Specifications
| Feature / Attribute | Technical Specification |
|---|---|
| Battery Chemistry | Lithium Nickel Manganese Cobalt Oxide (NCM 18650) |
| Nominal Voltage & Capacity | 3.7V / 3400mAh (12.58Wh) |
| Physical Dimensions & Weight | Ø 18.3 ± 0.2 × H 65.0 ± 0.3 mm / Approx. 46.5g ± 2.0g |
| Continuous Discharge Rating | 1.5C (5.1A max continuous discharge) |
| Peak Pulse Discharge | 2.5C–3.0C (8.5A–10.2A pulse ≤ 5s) |
| Target Applications | IoT telemetry nodes, portable medical gear, tactical lighting, electric inspection devices, custom battery pack modules |
| Terminal Form Factor | Flat Top / Button Top / Pre-welded Solder Tabs |
| Service Life / Endurance | ≥ 500–1,000 cycles (@ 80% DoD, 25°C, 0.5C/0.5C) |
Technical Specifications
| Parameter | Value | Test Conditions & Engineering Tolerances |
|---|---|---|
| Nominal Operating Voltage | 3.7V | Standard measurement @ 25°C, 0.2C rate |
| Upper Voltage / Cutoff | 4.20V ± 0.02V (CC/CV mode) | Regulation tolerance ±0.02V–0.03V |
| Discharge Lower Cutoff | 2.75V – 3.00V ± 0.03V | Safety lower voltage threshold |
| Internal AC Resistance (1kHz) | ≤ 25–40 mΩ | 1kHz AC test @ 25°C fully charged state |
| Cell Consistency Screening | ΔV ≤ 3mV | ΔR ≤ 1.5mΩ | Pre-assembly automated barcode classification SOP |
| Operating Temperature Range | Charge: 0~45°C | Discharge: -20~60°C | Ambient environmental test qualification |
Equipment Compatibility & Engineering Fit Check
Before deploying GEB 18650 3.7V 3400mAh High-Capacity Cylindrical Lithium-ion Battery Cell (18×65mm), verify these verified electrical and mechanical boundary requirements:
Operational Boundary Conditions
✔ Recommended Fit & Use Cases:
- Electronic devices and OEM packs matched with 3.7V / 3.4Ah 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 4.2V.
- 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.
