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14650 Batteries – Extended-Length AA-Derived Cylindrical Cells, Higher Capacity & Extended Runtime
Welcome to our 14650 Batteries collection. The 14650 lithium-ion cell (approx. 14mm diameter × 65mm length) is an "extended-length" derivative of the standard AA (14500) form factor. It retains the same 14mm diameter as AA/14500 while extending the length to approximately 65mm—the same length as an 18650—providing greater internal volume and significantly higher energy storage capacity within the AA ecosystem. Mainstream 14650 capacities range from 900mAh to 1600mAh, available in both NMC (ternary lithium) and LiFePO₄ (lithium iron phosphate) chemistries. It serves as the ideal power upgrade for high-performance flashlights, headlamps, portable medical devices, industrial inspection instruments, wireless sensors, and any AA-based device with a battery compartment that can accommodate the extended length.
Core Advantages of 14650 Batteries
- AA Diameter, Doubled Length, Doubled Energy: Approximately 14mm diameter (same as AA/14500) with a length of ~65mm (about 15mm longer than 14500, equal to 18650). The larger internal volume enables capacities of 900mAh–1600mAh—roughly 1.5× to 2× that of a 14500.
- High Voltage Platform: NMC versions deliver a nominal 3.7V (full charge 4.2V)—approximately 3× the voltage of NiMH AA (1.2V)—providing more power and brighter illumination.
- Rechargeable – Economical & Eco-Friendly: Supports 500–1,000+ charge/discharge cycles. Replaces disposable lithium primaries or NiMH cells for lower long-term cost and reduced battery waste.
- Flexible Chemistry Options: Available in both high-energy NMC (3.7V) and inherently safe LiFePO₄ (3.2V) formulations to meet diverse voltage and safety requirements.
- Low Self-Discharge: Monthly self-discharge as low as 3% ensures readiness even after extended storage—ideal for intermittently used devices.
- 18650 Charger Compatible: Shares the same 65mm length as 18650 cells, allowing charging in most 18650 Li-ion chargers (verify that the charger can securely hold 14mm diameter cells).
14650 vs. 14500 vs. 18650 – Key Comparison
| Parameter | 14650 | 14500 | 18650 |
|---|---|---|---|
| Dimensions | ~14mm × ~65mm | ~14mm × ~50mm | ~18mm × ~65mm |
| Volume (approx.) | 10.0 cm³ | 7.7 cm³ | 16.5 cm³ |
| Typical Capacity Range | 900mAh – 1600mAh | 600mAh – 1000mAh | 1500mAh – 3500mAh |
| Nominal Voltage | 3.2V (LiFePO₄) / 3.7V (NMC) | 3.2V / 3.7V | 3.2V / 3.7V |
| Energy (Wh) | 3.3Wh – 5.9Wh | 2.2Wh – 3.7Wh | 5.5Wh – 13Wh |
| Key Strengths | AA diameter + 18650 length, doubled capacity | Standard AA length, best compatibility | Larger diameter, highest capacity |
| Typical Applications | Long-runtime flashlights, medical devices, industrial instruments | Flashlights, toys, digital devices | Universal across all categories |
Popular 14650 Cell Models – Quick Reference
| Model | Brand/Source | Chemistry | Nominal Capacity | Continuous Discharge | Dimensions (approx.) | Positioning |
|---|---|---|---|---|---|---|
| INR14650 1600mAh | Generic | NMC | 1600mAh | 1A–2A | 14×65mm | Ultra-high-capacity NMC; top choice for long-runtime flashlights |
| ICR14650 1200mAh | Generic | LiCoO₂ | 1200mAh | 0.5A–1A | 14×65mm | Balanced; general consumer electronics |
| IFR14650 900mAh | Generic | LiFePO₄ | 900mAh | 0.5A–1A | 14×65mm | LiFePO₄; high safety / long cycle life |
| Vapcell INR14650 1600mAh | Vapcell | NMC | 1600mAh | 2A | 14×65mm | High-performance NMC; preferred for bright flashlights |
| Protected 14650 | Custom | NMC + PCB | 1000–1400mAh | 0.5A–1A | 14×66–67mm | Protected; consumer safety first choice |
Typical Specifications Range (14650)
| Parameter | Typical Range |
|---|---|
| Nominal Voltage | 3.2V (LiFePO₄) / 3.6V–3.7V (NMC) |
| Full Charge Voltage | 3.65V (LiFePO₄) / 4.2V (NMC) |
| Capacity Range | 900mAh – 1600mAh |
| Continuous Discharge Current | 0.5A – 2A (model dependent) |
| Internal Resistance | 40mΩ – 100mΩ |
| Cycle Life | 500 – 1500+ cycles (chemistry dependent) |
| Operating Temperature | Charge: 0°C~45°C / Discharge: -20°C~60°C |
| Dimensions | Diameter 13.8mm–14.5mm × Length 64.5mm–67.0mm (protected slightly longer) |
| Weight | Approx. 25g – 30g |
Typical Applications
| Application | Recommended Type | Suggested Models |
|---|---|---|
| High-performance flashlights / long-runtime EDC lights | NMC High-Capacity | Vapcell 1600mAh, INR14650 1600mAh |
| Headlamps / bike lights / searchlights | Protected 14650 / NMC | Protected 14650, ICR14650 1200mAh |
| Portable medical devices / monitors | LiFePO₄ / Protected | IFR14650 900mAh, Protected 14650 |
| Industrial inspection instruments / data terminals | NMC High-Capacity | Vapcell 1600mAh |
| Wireless sensors / IoT base stations | LiFePO₄ | IFR14650 900mAh |
| Smart home devices / smart locks | NMC / LiFePO₄ | INR14650 1600mAh, IFR14650 900mAh |
| Solar storage / emergency lighting | LiFePO₄ | IFR14650 900mAh |
| Electric toys / models | NMC High-Capacity | INR14650 1600mAh |
How to Choose the Right 14650 Battery?
| Your Requirement | Recommended Type | Suggested Model |
|---|---|---|
| I need maximum capacity for long-runtime flashlights or industrial devices | NMC High-Capacity | Vapcell 1600mAh, INR14650 1600mAh |
| I want built-in protection for worry-free use | Protected 14650 | Various protected 14650 models |
| Safety is critical; for medical or emergency applications | LiFePO₄ | IFR14650 900mAh |
| I need bulk quantities or custom packs | Contact our sales team | — |
⚠️ 14650 Battery Safety Guidelines
- Voltage Platform Awareness: 3.2V LiFePO₄ and 3.7V NMC cells cannot be mixed or charged with the same charger. Always verify device and charger compatibility.
- Increased Length – Verify Fitment: The 14650 is approximately 15mm longer than a standard 14500 and AA battery. Carefully measure your device's battery compartment length before purchase to ensure it can accommodate a ~65mm cell.
- Not a Universal AA Replacement: 14650 voltage (3.7V) is significantly higher than standard 1.5V AA cells. Connecting two 14650s in series for a 3V device may damage or destroy the device. Always confirm your device supports 3.7V Li-ion before use.
- Charger Compatibility: The 14650 shares the same 65mm length as 18650 cells and can be charged in most 18650 chargers. Verify that the charger can securely hold 14mm diameter cells (some charger negative slides may not grip narrower cells firmly—consider a universal multi-size charger).
- Avoid Over-Discharge: Stop discharging when voltage drops below 2.5V–2.8V (NMC) or 2.0V–2.5V (LiFePO₄). Recharge promptly to prevent permanent capacity loss.
- Avoid Short Circuits & Overheating: Do not short the terminals. Keep away from heat, moisture, and metal objects.
- Discontinue if Damaged: Stop using cells with torn wraps, dents, or leakage. Recycle responsibly.
Why Choose Our 14650 Batteries?
- Genuine Grade-A Cells: Sourced from Vapcell and other reputable manufacturers. 100% authentic—no recycled or counterfeit cells.
- Fully Tested & Matched: Every batch undergoes capacity grading, IR testing, and voltage sorting. Industrial-grade matching services available.
- Complete Portfolio: Covers NMC high-capacity, protected, and LiFePO₄ series—one-stop for all extended-length AA-sized Li-ion needs.
- 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, pack design, BMS integration, and after-sales service.
👇👇👇 Browse the product list below and filter by capacity or chemistry to find the perfect 14650 cell for your application. For volume quotes or custom pack solutions, please contact our engineering team.
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