Battery Building ToolsCell Database H18650CAP

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18650NMC Mooch-tested · 30 A

BAK H18650CAP

Name: BAK H18650CAP Lithium Battery Cell
Brand: BAK

BAK

Capacity2050 mAh7.38 Wh

Mooch continuous30 ASize to this figure

Resistance17 mΩDC internal resistance

Voltage window3.6 V2.5 – 4.2 V

Standard charge1000 mA~2.1 h to full

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

At 2050 mAh, this ranks #219 of 279 18650 cells in our database. On the lower end for capacity among 18650 cells. Higher discharge than 90% of 18650 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	30A (Mooch-tested)
Mooch CDR (trusted)	30 A
Standard charge current	1000 mA
Standard discharge current	400mA
Internal resistance	17 mΩ
Physical
Form factor	18650
Top type	Flat Top
Protected	No
Performance
Capacity	2050 mAh
Energy	7.38 Wh
Operating Limits
Discharge temp	-20°C to 75°C

Independent test data: Mooch's test of the H18650CAP ↗

At the standard 1000 mA charge rate, a full charge takes about 2.1 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: BAK H18650CAP (2050mAh)

C-Rate	Current (A)	Theoretical runtime
0.2C	0.41 A	5h 00m
0.5C	1.03 A	2h 00m
1C	2.05 A	1h 00m
2C	4.1 A	30m
3C	6.15 A	20m
5C	10.25 A	12m
8C	16.4 A	7m 30s
10C	20.5 A	6m
15C	30.75 A	4m

Highlighted row is closest to the rated 30A continuous discharge.

Charging

Rate	Current	Estimated time
0.5C	1,025 mA	~2h 00m
1C	2,050 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.

Datasheet

Download official BAK H18650CAP datasheet (PDF) ↗

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	2,050 mAh	7.4 Wh	30 A
2P	4,100 mAh	14.8 Wh	60 A
3P	6,150 mAh	22.1 Wh	90 A
4P	8,200 mAh	29.5 Wh	120 A
5P	10,250 mAh	36.9 Wh	150 A
6P	12,300 mAh	44.3 Wh	180 A

Example pack configurations

7S2P

24V ebike / small pack

14 cells25.2V nominal4,100mAh103Wh60A max

13S4P

48V ebike standard

52 cells46.8V nominal8,200mAh384Wh120A max

16S4P

DIY powerwall

64 cells57.6V nominal8,200mAh472Wh120A max

4S6P

Power tool replacement

24 cells14.4V nominal12,300mAh177Wh180A max

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.

Similar cells

Same format and chemistry, within ±500mAh capacity:

Cell	mAh	CDR	Wh	Weight	Wh/kg
BAK H18650CAP (this cell)	2050	30A	7.38	—	—
Panasonic CGR18650EA	2550	4.9A	9.4	46.5g	203
LG LGDBHE21865	2500	20A	9.3	48g	193
Sanyo UR18650F	2500	5A	9.3	47g	197
Sanyo UR18650FM	2500	5A	9.3	47g	197
EVE ICR18650-26V	2550	7A	9.2	45g	204

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 BAK H18650CAP?

What is the maximum discharge rate of the BAK H18650CAP?

How many H18650CAP cells do I need for a 48V ebike battery?

Can I use the H18650CAP for vaping?

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.