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21.6 × 70.9 mm · 72 g

21700NMC Mooch-tested · 40 A

Vapcell T20

Name: Vapcell T20 Lithium Battery Cell
Brand: Vapcell

Vapcell

Capacity2000 mAh7.2 Wh · 100 Wh/kg

Mooch continuous40 ASize to this figure

Resistance8 mΩDC internal resistance

Voltage window3.6 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 #72 of 72 21700 cells in our database. On the lower end for capacity among 21700 cells. Higher discharge than 75% of 21700 cells in our database. Great for high-drain builds.

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Full specifications

Electrical
Chemistry	NMC
Nominal voltage	3.6 V
Max charge voltage	4.2 V
Discharge cutoff	2.5 V
Max continuous discharge	40A (Mooch-tested)
Mooch CDR (trusted)	40 A
Standard charge current	2000 mA
Standard discharge current	400mA
Internal resistance	8 mΩ
Physical
Form factor	21700
Dimensions	21.6mm × 70.9mm
Weight	72 g
Top type	Flat Top
Protected	No
Wrap color	Red
Performance
Capacity	2000 mAh
Energy	7.2 Wh
Specific energy	100 Wh/kg
Energy density	277.13 Wh/L
Power density (gravimetric)	2,000 W/kg
Power density (volumetric)	5,543 W/L
Operating Limits
Charge temp	0°C to 45°C
Discharge temp	-20°C to 70°C

Independent test data: Mooch's test of the T20 ↗

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
3.6VMax charge
4.2V

Usable range: 1.7V

C-rate conversion: Vapcell T20 (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
5C	10 A	12m
8C	16 A	7m 30s
10C	20 A	6m
15C	30 A	4m
20C	40 A	3m

Highlighted row is closest to the rated 40A 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	3.6V	4.2V	2.5V	Flashlights, single-cell devices
2S	7.2V	8.4V	5V	RC vehicles, 7.2V packs
3S	10.8V	12.6V	7.5V	Power tools (10.8V nominal)
4S	14.4V	16.8V	10V	Ebike (small), some power tools
7S	25.2V	29.4V	17.5V	Ebike (24V system)
10S	36V	42V	25V	Ebike (36V system)
13S	46.8V	54.6V	32.5V	Ebike (48V standard)
14S	50.4V	58.8V	35V	Ebike (52V high-power)
16S	57.6V	67.2V	40V	DIY powerwall

Parallel capacity scaling

Config	Capacity	Energy	Max discharge
1P	2,000 mAh	7.2 Wh	40 A
2P	4,000 mAh	14.4 Wh	80 A
3P	6,000 mAh	21.6 Wh	120 A
4P	8,000 mAh	28.8 Wh	160 A
5P	10,000 mAh	36 Wh	200 A
6P	12,000 mAh	43.2 Wh	240 A

Example pack configurations

7S2P

24V ebike / small pack

14 cells25.2V nominal4,000mAh101Wh80A maxCell weight: 1.01 kg (add ~15% for wiring and BMS)

13S4P

48V ebike standard

52 cells46.8V nominal8,000mAh374Wh160A maxCell weight: 3.74 kg (add ~15% for wiring and BMS)

16S4P

DIY powerwall

64 cells57.6V nominal8,000mAh461Wh160A maxCell weight: 4.61 kg (add ~15% for wiring and BMS)

4S6P

Power tool replacement

24 cells14.4V nominal12,000mAh173Wh240A maxCell weight: 1.73 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 AudioEnough discharge to handle amplifier bursts without voltage sag.

High-Drain VapingAbove the 25A Mooch CDR threshold. Suitable for regulated and mechanical mods.

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

Power ToolsSufficient discharge and capacity for most power tool packs.

Physical dimensions

Dimensions21.6mm × 70.9mm

TopFlat Top

Format21700

Build with this cell

Pack PlannerSize your pack. Voltage, capacity, runtime, BMS.Pack Designer2D & 3D layout for your exact cell arrangement Pack BuilderBalance cells by capacity and internal resistance

Frequently asked questions

What is the capacity of the Vapcell T20?

What is the maximum discharge rate of the Vapcell T20?

How many T20 cells do I need for a 48V ebike battery?

What does the Vapcell T20 weigh?

Can I use the T20 for vaping?

What temperature range can the T20 operate in?

What size is the Vapcell T20?

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.