Battery Building ToolsCell Database INR18650

✱ Render

18.3 × 65 mm · 45 g

18650NMC Mooch-tested · 6 A

ATL INR18650

Name: ATL INR18650 Lithium Battery Cell
Brand: ATL

ATL

Capacity2000 mAh7.4 Wh · 164.44 Wh/kg

Mooch continuous6 ASize to this figure

Voltage window3.7 V2.5 – 4.2 V

Standard charge2000 mA~1 h to full

Build a pack with this cell →Download spec sheet (PDF)Mooch's test ↗

At 2000 mAh, this ranks #221 of 279 18650 cells in our database. On the lower end for capacity among 18650 cells. A mid-range 18650 cell. Solid for builds that don't need extreme capacity or discharge.

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Full specifications

Electrical
Chemistry	NMC
Nominal voltage	3.7 V
Max charge voltage	4.2 V
Discharge cutoff	2.5 V
Max continuous discharge	6A (Mooch-tested)
Mooch CDR (trusted)	6 A
Standard charge current	2000 mA
Standard discharge current	1000mA
Physical
Form factor	18650
Dimensions	18.3mm × 65mm
Weight	45 g
Top type	Flat Top
Protected	No
Wrap color	Blue
Insulator ring	White
Performance
Capacity	2000 mAh
Energy	7.4 Wh
Specific energy	164.44 Wh/kg
Energy density	432.84 Wh/L
Power density (gravimetric)	493 W/kg
Power density (volumetric)	1,299 W/L
Operating Limits
Charge temp	0°C to 45°C
Discharge temp	-20°C to 60°C

Independent test data: Mooch's test of the INR18650 ↗

At the standard 2000 mA charge rate, a full charge takes about 1 hours. The last bit is a slow taper to top it off.

Voltage operating window

Cutoff
2.5VNominal
3.7VMax charge
4.2V

Usable range: 1.7V

C-rate conversion: ATL INR18650 (2000mAh)

C-Rate	Current (A)	Theoretical runtime
0.2C	0.4 A	5h 00m
0.5C	1 A	2h 00m
1C	2 A	1h 00m
2C	4 A	30m
3C	6 A	20m

Highlighted row is closest to the rated 6A continuous discharge.

Charging

Rate	Current	Estimated time
0.5C	1,000 mA	~2h 00m
1C	2,000 mA	~1h 00m

These are estimates for the constant-current phase. Real charge time is a bit longer because of the slow taper at the end.

Pack scaling

Series voltage configurations

Config	Nominal V	Max V	Min V	Common use
1S	3.7V	4.2V	2.5V	Flashlights, single-cell devices
2S	7.4V	8.4V	5V	RC vehicles, 7.2V packs
3S	11.1V	12.6V	7.5V	Power tools (10.8V nominal)
4S	14.8V	16.8V	10V	Ebike (small), some power tools
7S	25.9V	29.4V	17.5V	Ebike (24V system)
10S	37V	42V	25V	Ebike (36V system)
13S	48.1V	54.6V	32.5V	Ebike (48V standard)
14S	51.8V	58.8V	35V	Ebike (52V high-power)
16S	59.2V	67.2V	40V	DIY powerwall

Parallel capacity scaling

Config	Capacity	Energy	Max discharge
1P	2,000 mAh	7.4 Wh	6 A
2P	4,000 mAh	14.8 Wh	12 A
3P	6,000 mAh	22.2 Wh	18 A
4P	8,000 mAh	29.6 Wh	24 A
5P	10,000 mAh	37 Wh	30 A
6P	12,000 mAh	44.4 Wh	36 A

Example pack configurations

7S2P

24V ebike / small pack

14 cells25.9V nominal4,000mAh104Wh12A maxCell weight: 0.63 kg (add ~15% for wiring and BMS)

13S4P

48V ebike standard

52 cells48.1V nominal8,000mAh385Wh24A maxCell weight: 2.34 kg (add ~15% for wiring and BMS)

16S4P

DIY powerwall

64 cells59.2V nominal8,000mAh474Wh24A maxCell weight: 2.88 kg (add ~15% for wiring and BMS)

4S6P

Power tool replacement

24 cells14.8V nominal12,000mAh178Wh36A maxCell weight: 1.08 kg (add ~15% for wiring and BMS)

Design a custom pack with this cell:

Pack Planner →Pack Designer →

Application suitability

PowerwallsUsable for powerwalls but lower capacity means you'll need more cells to hit your target kWh.

Ebike PacksMarginal. Check your motor's peak draw first. You might get voltage sag under load.

Car AudioNot enough discharge for car audio amplifiers. You need at least 15-20A continuous for most setups.

High-Drain VapingBelow the 25A Mooch CDR threshold that high-drain vaping needs. Use a higher-drain cell.

FlashlightsLower capacity means shorter runtime. Better cells are available for flashlight use.

Power ToolsNot enough discharge or capacity for power tool use.

Physical dimensions

Dimensions18.3mm × 65mm

TopFlat Top

Format18650

Similar cells

Same format and chemistry, within ±500mAh capacity:

Cell	mAh	CDR	Wh	Weight	Wh/kg
ATL INR18650 (this cell)	2000	6A	7.4	45g	164.44
LG LGDBHE21865	2500	20A	9.3	48g	193
Sanyo UR18650F	2500	5A	9.3	47g	197
Sanyo UR18650FM	2500	5A	9.3	47g	197
BAK N18650COP	2500	30A	9	47g	191
BAK N18650NCP	2500	30A	9	47g	191

Build with this cell

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Frequently asked questions

What is the capacity of the ATL INR18650?

What is the maximum discharge rate of the ATL INR18650?

How many INR18650 cells do I need for a 48V ebike battery?

What does the ATL INR18650 weigh?

Can I use the INR18650 for vaping?

What temperature range can the INR18650 operate in?

What size is the ATL INR18650?

Handling and safety

Lithium cells can be dangerous if mishandled. A few things to keep in mind:

Never charge above 4.2V or discharge below 2.5V.
Store cells at around 3.6-3.8V (roughly 40-60% charge) for long-term storage.
Don't mix cells with different capacities, chemistries, or states of charge in a pack.
Inspect wraps before use. A torn wrap can cause a short circuit.
Always use a BMS or balance charger appropriate for your pack configuration.
Keep cells away from metal objects, keys, and coins. A short across the terminals can cause fire.

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Specs come from manufacturer datasheets and independent testing; Mooch-tested discharge ratings are shown when available because they reflect real continuous performance better than headline datasheet numbers. Browse the full 18650 & 21700 cell database to compare every cell.

Disclaimer: We do our best to keep the information on this page accurate, but we cannot guarantee that all specifications are correct or up to date. Cell characteristics can vary between production batches and may change over time. Do not rely solely on this data for safety-critical applications. Always verify against the manufacturer's official datasheet before use.