Battery Building ToolsCell Database CMICR18650F

✱ Render

18.3 × 65 mm · 45.5 g

18650NMC

Cham CMICR18650F

Q: What is the capacity of the Cham CMICR18650F?

The Cham CMICR18650F has a rated capacity of 2,600mAh (9.62Wh at 3.7V nominal).

Q: What is the maximum discharge rate of the Cham CMICR18650F?

The manufacturer rates the CMICR18650F at 2.6A continuous discharge.

Q: How many CMICR18650F cells do I need for a 48V ebike battery?

A 48V ebike pack uses a 13S configuration. With the CMICR18650F's 3.7V nominal, 13S gives you 48.1V nominal. A 13S4P pack (52 cells) delivers 10,400mAh (500Wh). That covers most 48V ebike applications.

Q: What does the Cham CMICR18650F weigh?

The CMICR18650F weighs 45.5g with a specific energy of 211.43Wh/kg.

Q: Can I use the CMICR18650F for vaping?

Not recommended. The CMICR18650F is below the 25A Mooch CDR threshold that high-drain vaping requires. A cell with a higher CDR is the safer choice.

Q: What is the cycle life of the Cham CMICR18650F?

The CMICR18650F is rated for 300 cycles to 80% capacity retention under standard test conditions.

Q: What temperature range can the CMICR18650F operate in?

Charge: 0°C to 45°C. Discharge: -20°C to 60°C.

Q: What size is the Cham CMICR18650F?

The CMICR18650F measures 18.30mm × 65.00mm and weighs 45.5g. It is a Flat Top 18650 cell.

Cham · released 2011

Capacity2600 mAh9.62 Wh · 211.43 Wh/kg

Rated continuous2.6 A2.55A

Resistance40 mΩDC internal resistance

Voltage window3.7 V2.5 – 4.2 V

Standard charge1300 mA~2 h to full

Build a pack with this cell →Download spec sheet (PDF)Open the datasheet

At 2600 mAh, this ranks #96 of 279 18650 cells in our database. Mid-range for capacity among 18650 cells. A mid-range 18650 cell. Solid for builds that don't need extreme capacity or discharge.

Photos from the community

See the wrap, markings, and terminals up close.

Have this cell in hand?

Community photo submissions are opening soon.

Full specifications

Electrical
Chemistry	NMC
Nominal voltage	3.7 V
Max charge voltage	4.2 V
Discharge cutoff	2.5 V
Max continuous discharge	2.55A
Standard charge current	1300 mA
Standard discharge current	2600mA
Internal resistance	40 mΩ
Physical
Form factor	18650
Dimensions	18.3mm × 65mm
Weight	45.5 g
Top type	Flat Top
Protected	No
Wrap color	Blue
Insulator ring	Grey
Performance
Capacity	2600 mAh
Energy	9.62 Wh
Specific energy	211.43 Wh/kg
Energy density	562.69 Wh/L
Power density (gravimetric)	211 W/kg
Power density (volumetric)	563 W/L
Cycle life	300 cycles
Year released	2011
Operating Limits
Charge temp	0°C to 45°C
Discharge temp	-20°C to 60°C

At the standard 1300 mA charge rate, a full charge takes about 2 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: Cham CMICR18650F (2600mAh)

C-Rate	Current (A)	Theoretical runtime
0.2C	0.52 A	5h 00m
0.5C	1.3 A	2h 00m
1C	2.6 A	1h 00m

Highlighted row is closest to the rated 2.6A continuous discharge.

Charging

Rate	Current	Estimated time
0.5C	1,300 mA	~2h 00m
1C	2,600 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 Cham CMICR18650F datasheet (PDF) ↗

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	2,600 mAh	9.6 Wh	2.6 A
2P	5,200 mAh	19.2 Wh	5.2 A
3P	7,800 mAh	28.9 Wh	7.8 A
4P	10,400 mAh	38.5 Wh	10.4 A
5P	13,000 mAh	48.1 Wh	13 A
6P	15,600 mAh	57.7 Wh	15.6 A

Example pack configurations

7S2P

24V ebike / small pack

14 cells25.9V nominal5,200mAh135Wh5A maxCell weight: 0.64 kg (add ~15% for wiring and BMS)

13S4P

48V ebike standard

52 cells48.1V nominal10,400mAh500Wh10A maxCell weight: 2.37 kg (add ~15% for wiring and BMS)

16S4P

DIY powerwall

64 cells59.2V nominal10,400mAh616Wh10A maxCell weight: 2.91 kg (add ~15% for wiring and BMS)

4S6P

Power tool replacement

24 cells14.8V nominal15,600mAh231Wh16A maxCell weight: 1.09 kg (add ~15% for wiring and BMS)

Design a custom pack with this cell:

Pack Planner →Pack Designer →

Application suitability

PowerwallsHigh capacity means more stored energy per cell. Fewer cells needed for a given kWh target.

Ebike PacksNot enough discharge for ebike use. Voltage sag would be a problem 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.

FlashlightsDecent runtime. Works well for most flashlights.

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
Cham CMICR18650F (this cell)	2600	2.6A	9.62	45.5g	211.43
LG LGABD11865	3000	5.8A	11.3	48.5g	232
LG LGDBD11865	3000	5.8A	11.3	48.5g	232
Nitecore NL1831	3100	35A	11.2	—	—
Panasonic NCR18650BD	3100	10A	11.2	49.5g	225
Samsung ICR18650-30B	2950	5.9A	11.2	48g	232

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 Essential ToolsSpot welders, testers, nickel strip and other supplies for your build Build GuideStep-by-step 18650 pack build from salvaging to final assembly

Frequently asked questions

What is the capacity of the Cham CMICR18650F?

What is the maximum discharge rate of the Cham CMICR18650F?

How many CMICR18650F cells do I need for a 48V ebike battery?

What does the Cham CMICR18650F weigh?

Can I use the CMICR18650F for vaping?

What is the cycle life of the Cham CMICR18650F?

What temperature range can the CMICR18650F operate in?

What size is the Cham CMICR18650F?

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.

Get new tools and build tips

We are always adding tools, cell data, and guides. Drop your email for new tool releases and battery-building tips. No spam, unsubscribe anytime.

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.