2200MAh 18650 Battery Datasheet (2026): 3.6–3.7V Specs

TLDR

A 2200mAh 18650 battery datasheet is a one-page or multi-page technical document describing a cylindrical lithium-ion cell that measures roughly 18mm by 65mm and stores about 2.2 amp-hours of energy. The capacity number alone tells you very little. What matters more for safe selection are the maximum continuous discharge current (which ranges from 2.2A to 10A across different 2200mAh cells), the charge and discharge voltage limits, operating temperature, cycle life test conditions, and compliance documents like UN38.3 and SDS. This guide explains every line on the datasheet and shows how to compare cells rather than just match mAh ratings.

What a 2200mAh 18650 Battery Datasheet Actually Tells You

A datasheet is not marketing copy. It is an engineering reference that defines how a cell should be charged, discharged, stored, integrated, and tested. For a 2200mAh 18650 battery, the datasheet covers the cell’s nominal capacity, voltage window, current limits, temperature ranges, physical dimensions, weight, internal resistance, cycle life, and safety warnings.

The number “18650" follows a dimensional naming convention: the first two digits indicate roughly 18mm diameter, and the remaining digits indicate 65.0mm length, as described in NFPA’s lithium-ion hazard report. The “2200mAh" portion means the cell stores 2.2 amp-hours under specific test conditions defined in the datasheet, not under every load scenario.

Most search results for this query return raw PDF files. Those documents are useful if you already know what every line means. If you do not, the tables are just walls of numbers. This guide bridges that gap.

For B2B buyers sourcing cells in this capacity class, Wintonic offers an 18650 2200mAh 3.7V cell with OEM/ODM support and compliance documentation.

Quick Spec Reference for a Typical 2200mAh 18650 Cell

Before explaining each parameter, here is what a typical 2200mAh 18650 battery datasheet looks like in summary form. Values below represent common ranges across multiple publicly available datasheets.

These numbers are not universal. Every cell model has its own datasheet, and you should always request the specific document before making sourcing or design decisions.

What “2200mAh" Really Means in Practice

The capacity rating on a 2200mAh 18650 datasheet is measured under controlled conditions. The cell is typically charged using a CC/CV method (constant current to 4.2V, then constant voltage until the current tapers), rested, and then discharged at a specified C-rate, usually 0.2C or 0.5C, down to the cutoff voltage. The mAh number is the result of that specific test.

Battery University defines C-rate as the charge or discharge current expressed relative to the battery’s rated capacity. For a 2.2Ah cell, 1C equals 2.2 amps. That means 0.2C equals just 440mA, which is a very gentle discharge rate. Under heavier loads, the usable capacity will drop.

A LinkedIn post from Trydan Tech put it plainly: the capacity printed on a datasheet is only part of the story, because as discharge current increases, usable capacity falls due to voltage drop and internal resistance losses. This is not a flaw. It is physics. The datasheet mAh number represents an upper bound measured under favorable conditions.

Here is the C-rate conversion table for a 2200mAh cell:

These are theoretical numbers. Real discharge times are shorter because voltage sag and cutoff thresholds end the discharge before the cell is mathematically “empty."

Understanding Voltage: Nominal, Charge, and Cutoff

One of the most misread sections of a 2200mAh 18650 battery datasheet is the voltage information. Three numbers matter, and they are often confused.

Nominal voltage is the average voltage during discharge, typically 3.6V or 3.7V for lithium-ion NMC/ICR/INR cells. Samsung’s ICR18650-22P datasheet lists 3.62V nominal. This is the number used for energy calculations.

Charge voltage (end-of-charge voltage) is the upper limit, almost always 4.2V for standard lithium-ion 18650 cells. Samsung’s datasheet specifies 4.2V plus or minus 0.05V. Exceeding this voltage risks thermal runaway and shortened cycle life.

Discharge cutoff voltage is where discharge should stop. Across reviewed 2200mAh datasheets, this ranges from 2.75V to 3.0V. Over-discharging beyond this point can permanently damage the cell’s internal structure.

The key mistake: seeing “3.7V" on a battery wrap and assuming that is the full-charge voltage. A fully charged lithium-ion 18650 sits at about 4.2V. The 3.7V label is nominal, meaning average.

The Most Important Line: Maximum Continuous Discharge Current

Capacity gets all the attention. Discharge current determines whether the cell actually works in your application. This is where 2200mAh 18650 datasheets diverge most sharply from one another.

Across publicly available datasheets for 2200mAh-class cells:

• Winway’s 18650-2200mAh NMC cell lists 1C (2.2A) continuous discharge
• AntBatt’s 18650-3.6V-2200mAh lists 6.6A (3C) continuous with a 10A pulse rating
• Samsung’s ICR18650-22P lists 10A continuous discharge

That is a fivefold difference in current capability across cells with the same capacity class. Putting a 1C-rated cell into a vacuum cleaner or power tool that draws 8 amps will overheat the cell and create a genuine safety hazard.

Practitioners on Reddit frequently encounter this confusion. In one thread about identifying an SF 18650NR-22 cell, a user saw both “0.5C" and “6.6A" on the same spec sheet and asked if they contradicted each other. The community clarified that 0.5C was the capacity test rate, while 6.6A was the maximum continuous discharge. These are different parameters answering different questions.

Rule of thumb: the capacity line tells you energy storage. The discharge current line tells you whether the cell can safely deliver the power your device demands.

2200mAh 18650 Datasheet Comparison

Comparing cells by mAh alone is like comparing cars by fuel tank size. Here is a side-by-side look at real datasheet values from several 2200mAh 18650 cells.

Notice the Orion cell uses a 3.0V cutoff while most others use 2.75V. That higher cutoff means the cell delivers slightly less total energy per cycle, but it may improve long-term cycle life. These are design tradeoffs, and the datasheet is where they show up.

For buyers who need a slightly lower capacity option, Wintonic also manufactures an 18650 2000mAh cell for applications where discharge current or cost matters more than maximum energy per cell.

Why Your Real Runtime Will Be Lower Than the Datasheet mAh

There is a persistent gap between what a 2200mAh 18650 battery datasheet promises and what users actually experience. Several factors drive this.

Higher discharge current. Capacity is tested at 0.2C or 0.5C. If your application pulls 2C or 3C, usable capacity drops because of internal resistance losses and earlier voltage cutoff.

Temperature. Cold weather reduces capacity significantly. Battery University notes that low temperatures reduce usable performance and that charging below freezing can cause lithium plating, which is both a performance and safety concern. Most 2200mAh 18650 datasheets specify charging only above 0 degrees C.

Aging. After hundreds of cycles, a cell that once tested at 2200mAh may deliver 1800mAh or less, depending on charge/discharge conditions and temperature history.

Cutoff voltage settings. A device that cuts off at 3.0V instead of 2.75V will extract less energy from the same cell. This is a deliberate design choice for longevity, but it means fewer mAh per cycle.

None of this makes the datasheet wrong. The datasheet describes the cell under defined conditions. Your conditions will differ.

Can You Replace a 2200mAh 18650 With a Higher-Capacity Cell?

This is one of the most common questions from people searching for a 2200mAh 18650 datasheet. They want to upgrade a vacuum, flashlight, laptop pack, or hand tool.

The short answer: sometimes yes, but mAh is not the only thing to match.

Community repair threads on Reddit consistently show experienced users steering the conversation away from pure capacity upgrades. In a thread about replacing Samsung ICR18650-22P cells, the consensus was clear: voltage chemistry, discharge current rating, physical dimensions, BMS compatibility, and pack matching all matter as much as (or more than) the mAh number.

Here is the replacement checklist:

1. Match the voltage chemistry. A 3.6V/3.7V lithium-ion cell should not be swapped with a 3.2V LiFePO4 cell unless the charger and BMS are designed for it. If you are curious about LiFePO4 cylindrical cells, they are a different chemistry entirely with different charge profiles.

2. Check physical fit. Bare 18650 cells are about 18mm by 65mm. Protected cells and button-top cells are often 2 to 3mm longer and may not fit in tight holders or packs.

3. Meet or exceed the continuous discharge current. A device pulling 8A needs a cell rated for at least 8A continuous, regardless of capacity.

4. Replace all series cells together. Mixing old and new cells, or different models, creates dangerous imbalance in a series pack.

5. Verify charger and BMS compatibility. The protection circuit must match the pack voltage, current limits, cell count, and chemistry.

6. Use spot-welded tabs or proper holders. Direct soldering to cells damages them unless the process is specifically engineered and qualified.

Calculating Wh and Pack Capacity

A single 2200mAh 18650 cell at 3.7V nominal stores about 8.14Wh. Orion’s datasheet confirms this: 2200mAh at 3.7V equals 8.14Wh. With a 3.6V nominal voltage, the figure drops to 7.92Wh.

For battery packs, the math scales as follows:

• 4S1P pack (4 cells in series, 1 parallel): 14.8V nominal, 2.2Ah, roughly 32.6Wh
• 4S2P pack (4 series, 2 parallel): 14.8V nominal, 4.4Ah, roughly 65.1Wh
• 13S10P pack (common e-bike configuration): 48.1V nominal, 22Ah, roughly 1,058Wh

Series connections increase voltage. Parallel connections increase capacity and available current, assuming cells are matched and the pack design supports it.

For buyers interested in complete 18650 packs rather than individual cells, Wintonic manufactures configurations like a 48V 22Ah 13S10P e-bike pack that bundles cell selection, BMS, and enclosure into a single sourced unit.

Is 2200mAh Still a Relevant Capacity Class?

Yes, though it is not the highest capacity available in the 18650 format. Samsung’s ICR18650-22P dates back to 2010. Today, premium 18650 cells reach 3500mAh, and tested 4000mAh-class cells like the Vapcell N40 now exist with real-world capacity measurements backing up the claims.

Older community advice warned that anything above 3500mAh in an 18650 was fake. That guidance caught many scams and still catches the obvious frauds (listings claiming 6800mAh or 9900mAh for an 18650 are still blatantly false). But the hard ceiling has shifted. The better approach is to verify the datasheet, check the cell weight, and look for independent test data rather than relying on a single mAh threshold.

UL Research Institutes warns that counterfeit cells may omit safety mechanisms and print capacity numbers beyond what the cell volume can physically deliver.

A 2200mAh 18650 remains appropriate for many applications: cost-sensitive builds, moderate-energy use cases, and scenarios where high continuous discharge matters more than maximum stored energy. The Samsung 22P, despite its modest capacity, supports 10A continuous, which many 3000mAh+ cells cannot match.

When higher per-cell capacity is needed, consider stepping up to a 21700 format cell, which offers more volume and typically 4000 to 5000mAh in the same lithium-ion chemistry.

How to Verify a 2200mAh 18650 Cell Sample

For procurement teams and engineers evaluating a new cell supplier, a datasheet alone is not verification. Here is a practical sample qualification process.

1. Record the label, model number, lot code, dimensions, and weight. Compare weight against datasheet specs and known benchmarks. A genuine 2200mAh 18650 typically weighs 42 to 48 grams.

2. Charge using the datasheet’s CC/CV method (usually 0.5C or 1C to 4.2V, taper to 0.01C or specified cutoff).

3. Rest the cell for at least 30 minutes.

4. Discharge at 0.2C or 0.5C to the datasheet cutoff voltage.

5. Record total mAh and Wh delivered.

6. Repeat across multiple samples from the same lot to check consistency.

7. Test voltage sag under the intended application current.

8. Inspect the wrap, top insulator ring, and terminal construction. Battery tester “Mooch" on YouTube repeatedly stresses that a torn wrap or missing top insulator creates a short-circuit path in metal-bodied devices, and it is not just cosmetic damage.

Users on CandlePowerForums have validated 2200mAh protected cells by discharging samples and measuring around 2221mAh actual capacity, confirming the cells as “true 2.2Ah" units. This kind of hands-on verification is standard practice in serious procurement.

For a deeper look at sourcing strategy, see our guide on sourcing 18650 cells for OEM applications.

Safety, BMS, and Transport Documents

A 2200mAh 18650 battery datasheet is necessary but not sufficient for safe integration. The datasheet describes the cell. It does not describe the pack, the charger, the BMS, or the transport pathway.

Loose cell safety

The U.S. CPSC has issued a direct warning against consumer use of loose 18650 cells, stating that serious injury or death can occur when lithium-ion cells are separated from battery packs and used to power devices. This warning applies to all 18650 cells, not just specific brands or capacities.

Temperature limits are not suggestions

Datasheets specify separate charge and discharge temperature ranges for a reason. Charging a lithium-ion cell below 0 degrees C can cause lithium plating on the anode, which is irreversible and can lead to internal short circuits. Most 2200mAh datasheets allow charging between 0 and 45 degrees C, while discharge ranges are wider (typically minus 20 to 60 degrees C).

Transport compliance

For B2B shipments, PHMSA requires lithium batteries to undergo UN38.3 design testing and mandates a test summary document. IATA guidance further specifies that lithium-ion cells above 2.7Wh must be shipped at a reduced state of charge in many configurations. A 2200mAh 18650 at 3.7V stores about 8.14Wh, well above that threshold.

Pack design

Samsung’s 22P datasheet includes system-level warnings: the pack design should prevent over-discharge, and different cell types or manufacturers should not be mixed. Orion’s datasheet similarly warns that incorrect use outside voltage, current, and temperature requirements can cause leaking, heat, smoke, fire, or explosion.

The takeaway: a cell datasheet is a component-level document. Safe deployment requires charger design, BMS/PCM selection, thermal management, mechanical insulation, and transport documentation.

Sourcing Checklist for B2B Buyers

When purchasing 2200mAh 18650 cells in bulk, request and verify the following before confirming a production order:

1. Latest revision datasheet with model number, date, and revision code
2. UN38.3 test summary for the specific cell model
3. SDS/MSDS (Safety Data Sheet)
4. IEC 62133 test report if the cells go into portable products
5. UL 1642 recognition if required by the target market or end customer
6. CB certificate for international market acceptance
7. Lot-level QC data showing capacity, impedance, and OCV distribution
8. Sample cells for independent testing before committing to volume
9. Shipping marks and packaging compliance for air, sea, or ground transport
10. OEM/ODM terms covering labeling, branding, and minimum order quantities

This list is not optional. It is the baseline for responsible sourcing. Cells without proper documentation create regulatory, liability, and safety exposure at every stage of the supply chain.

For OEM/ODM e-bike or e-scooter pack projects built around 18650 cells, Wintonic provides custom pack assembly services that bundle cell selection, BMS coordination, labeling, and compliance documentation.

Datasheet Glossary: Key Terms Defined

FAQ

What voltage is a 2200mAh 18650 battery?

Most standard lithium-ion 18650 cells in this capacity class carry a nominal voltage of 3.6V or 3.7V. The full-charge voltage is 4.2V, and the discharge cutoff is usually 2.75V or 3.0V. Samsung’s ICR18650-22P lists 3.62V nominal with a 4.2V charge limit.

How many watt-hours does a 2200mAh 18650 hold?

At 3.7V nominal, a 2200mAh cell stores about 8.14Wh. At 3.6V nominal, it is 7.92Wh. The exact number depends on which nominal voltage the manufacturer uses for that specific cell.

What is the maximum discharge current for a 2200mAh 18650?

It depends entirely on the cell model. Reviewed datasheets range from 2.2A (1C) for general-purpose cells to 10A continuous for Samsung’s ICR18650-22P. Always check the specific cell’s datasheet rather than assuming a current from the mAh rating.

Can I use a 3000mAh or 3500mAh 18650 to replace a 2200mAh cell?

Often yes, provided the replacement matches the original cell’s voltage chemistry, physical dimensions, terminal type, continuous discharge current, charger/BMS compatibility, and cutoff voltage. All cells in a series pack should be replaced together with matched units.

What does 0.2C mean on a 2200mAh 18650 battery datasheet?

For a 2.2Ah cell, 0.2C equals 0.44 amps (440mA). This is a common capacity test rate that produces the most favorable mAh number. Real-world loads are usually higher, which means real-world capacity is lower.

Are 18650 cells with 5000mAh or higher capacity real?

No. As of current technology, the maximum verified 18650 capacity is around 4000mAh. Listings claiming 5000mAh, 6800mAh, or 9900mAh are misleading or fraudulent. UL Research Institutes has specifically warned about counterfeit cells that print capacity numbers beyond what the cell volume supports.

What documents should I request when buying 18650 cells in bulk?

At minimum: the current datasheet, UN38.3 test summary, SDS/MSDS, and applicable certification documents (IEC 62133, UL 1642, CB certificate). Also request lot-level test data and sample cells for independent qualification testing.

Is a 2200mAh 18650 outdated?

It is a mature capacity class, not an obsolete one. The 2200mAh 18650 remains cost-effective for many applications, especially those that prioritize discharge current, cycle life, or budget over maximum energy density. Some of the best high-drain 18650 cells still fall in this capacity range.

For B2B buyers ready to evaluate 2200mAh 18650 cells with full documentation and OEM/ODM flexibility, explore Wintonic’s 18650 2200mAh lithium-ion cell and request the latest datasheet, sample pricing, and compliance package.