14650 Lithium Battery 1200mAh 3.7V | INR14650 Cylindrical Li-ion Cell

14650 Lithium Battery — INR14650 1200mAh 3.7V Cylindrical Li-ion Cell

The 14650 lithium battery (model INR14650) is the longest member of the 14 mm cylindrical family: 14 mm in diameter and 65 mm in height, delivering 1200 mAh at a nominal 3.7 V — about 4.4 Wh in the same diameter as an AA cell but more than double the length of a 14280. It is charged by standard CC-CV at 4.20 V and is the default single-cell format when a device bay is deep enough for it but too narrow for an 18650. CMX Battery supplies it with per-lot capacity, IR and OCV test data, OEM branding, and a downloadable datasheet.

Table of contents: Specifications · What Is a 14650 Battery? · 14mm Family Comparison · Charge & Discharge · Cycle Life & Safety · Applications · Certifications · OEM/ODM & Ordering · FAQ

14650 Battery Specifications

Typical values below reflect the production standard for this format; final parameters ship against the CMX controlled product specification.

What Is a 14650 Battery?

A 14650 battery is a rechargeable cylindrical lithium-ion cell whose designation encodes its geometry: 14 mm diameter, 65 mm height, cylindrical format. At 65 mm it is the longest cell in regular production at the 14 mm diameter — 15 mm longer than a 14500, and the format of choice when a device bay is deep but narrow: too slim for an 18650 (18 mm), too long for a 14500.

Like all li-ion cylindricals, the 14650 delivers 3.6–3.7 V nominal (4.20 V fully charged), so it substitutes directly only in devices designed for li-ion input. The cell is a sealed steel can with a CID safety vent; welding is permitted only on the top cap and bottom end, never on the side wall.

14650 vs 14500, 14430 and 14280: 14mm Family Comparison

All models share a 14 mm diameter; length — and therefore capacity — is what separates them. Use this table to confirm fitment before sampling.

A 14500 needs 15 mm of extra bay depth to accept the 14650 — a mechanical change, not a swap. Within the same bay the 14650 roughly doubles the runtime of a 14500 at the same voltage and protection architecture. For the shorter personal-care and lighting formats, see the 14280, 14430 and 14500 pages.

14650 Charge and Discharge Profile

Charging follows CC-CV: constant current at the standard rate until the terminal voltage reaches 4.20 V ± 0.05 V, then hold at 4.20 V until the current tapers to the cut-off threshold. The maximum charge current is 1C (1200 mA); routine fast charging above the standard rate accelerates capacity fade. Charge temperature is specified 0–45 °C — below 0 °C, charge current must be limited or charging skipped to avoid lithium plating on the anode.

Discharging is rated 3C-class (3.6 A) for pulse loads such as radio transmit bursts; continuous operation should stay at or below 2C (2.4 A), with a 2.75 V cut-off. Discharge must terminate if the cell surface exceeds 60 °C.

14650 Cycle Life and Safety Performance

Cycle life for this format is typically specified at ≥70% of initial capacity after 300 cycles of standard-rate discharge at room temperature. (Cycling at high temperature ≥35 °C, high rate, or high voltage shortens life.)

Safety testing for production cells of this format covers over-discharge, overcharge, external short circuit, drop, heating and crush — all with no fire, no explosion, no leakage. A CID safety vent and optional protection circuit provide overpressure and overcurrent protection inside the sealed steel can.

14650 Battery Applications

Two-way radios and communication devices. The classic 14650 application. Handheld radio bays drawn around the 14 × 65 mm envelope accept the cell directly, and transmit bursts of 2–3 A sit inside the 3C-class pulse envelope with the 1200 mAh capacity covering a full shift of typical duty cycles.

Instrument and meter packs. Serviceable single-cell packs for test equipment, portable instruments and measurement devices, where per-lot test data simplifies incoming QC.

High-energy hobby and model packs. The longest 14 mm cell delivers the most runtime per bay in RC receivers, transmitters and small servo setups.

Emergency and standby lighting. Deeper bays in lanterns and emergency lights use the 14650 where a 14500 cannot deliver the required runtime.

Cold-environment deployments. The low-temperature grade (1600 mAh class, discharge to −40 °C) serves outdoor monitoring and field equipment.

Certifications and Shipping Compliance

Every INR14650 ships against the documentation compliance teams ask for first: UN38.3 (the UN Manual of Tests and Criteria test summary required for lithium transport by air and sea), MSDS, IEC 62133-2 cell safety compliance, CB report, and RoHS declaration. Lot-level documentation — capacity, internal resistance and open-circuit voltage per cell — accompanies each shipment so incoming QC starts from data rather than sampling. For the full certification scope, see our lithium battery certifications and compliance page.

OEM/ODM Customization and Ordering

CMX Battery supplies the INR14650 for OEM programs: welded tabs or connectors to your drawing, shrink-wrap or label branding with your model number, and packaging configured to your line. Cells ship at partial SOC with per-lot test data. Samples are available for bench validation before volume commitment; minimum order quantities, lead times and per-lot test-data format are confirmed with your quotation, which comes back within 24 hours. Warranty is one year from date of shipment against manufacturing defects.

Frequently Asked Questions

What is a 14650 battery?
A 14650 battery is a rechargeable cylindrical li-ion cell (Ø14 × 65 mm, 1200 mAh, 3.7 V nominal) — the longest member of the 14 mm family. Our model is INR14650.

Is the 14650 battery rechargeable?
Yes. It is a secondary li-ion cell rated for repeated CC-CV cycling at 4.20 V, typically specified at ≥70% capacity retention after 300 standard cycles.

What is a 14650 battery used for?
Two-way radios and communication devices, instrument and meter packs, high-energy hobby packs, and emergency lighting bays too deep for a 14500.

How do you charge a 14650 battery?
CC-CV to 4.20 V ± 0.05 V with taper cut-off; maximum charge current is 1C (1200 mA), and charging is specified only within 0–45 °C. Below 0 °C, reduce current or skip charging.

What is the maximum discharge current?
3C-class (3.6 A) for pulse loads such as radio transmit bursts; continuous operation should stay at or below 2C (2.4 A) to a 2.75 V cut-off.

Can I use a 14500 instead of a 14650?
It fits the same 14 mm diameter but is 15 mm shorter and delivers roughly half the capacity — a runtime compromise at the same voltage platform.

Is the 14650 available with OEM branding?
Yes — welded tabs or connectors, custom labels with your model number and tailored packaging are standard services, with per-lot test data on every shipment.

Request a Quote

Send your target voltage, capacity, continuous current and mechanical envelope — you will receive a datasheet-matched quotation, sample options and lead time within 24 hours.

Or email sales@cmxbattery.com. Download the typical specifications overview: INR14650 Typical Specifications Overview (PDF). The controlled product datasheet is issued with your quotation on request.