Battery Building ToolsCell Database LR2170SA

✱ Render

21.7 × 70.9 mm · 69 g

21700NMC Mooch-tested · 12 A

Lishen LR2170SA

Name: Lishen LR2170SA Lithium Battery Cell
Brand: Lishen

Lishen · released 2017

Capacity4000 mAh14.4 Wh · 208.7 Wh/kg

Mooch continuous12 ASize to this figure

Resistance25 mΩDC internal resistance

Voltage window3.6 V2.75 – 4.2 V

Standard charge2000 mA~2 h to full

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

At 4000 mAh, this ranks #49 of 72 21700 cells in our database. On the lower end for capacity among 21700 cells. A mid-range 21700 cell. Solid for builds that don't need extreme capacity or discharge.

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Full specifications

Electrical
Chemistry	NMC
Nominal voltage	3.6 V
Max charge voltage	4.2 V
Discharge cutoff	2.75 V
Max continuous discharge	12A (Mooch-tested)
Mooch CDR (trusted)	12 A
Standard charge current	2000 mA
Standard discharge current	2000mA
Internal resistance	25 mΩ
Physical
Form factor	21700
Dimensions	21.7mm × 70.9mm
Weight	69 g
Top type	Flat Top
Protected	No
Wrap color	Blue
Performance
Capacity	4000 mAh
Energy	14.4 Wh
Specific energy	208.7 Wh/kg
Energy density	549.17 Wh/L
Power density (gravimetric)	626 W/kg
Power density (volumetric)	1,648 W/L
Cycle life	1000 cycles
Year released	2017
Operating Limits
Charge temp	0°C to 45°C
Discharge temp	-20°C to 60°C

Independent test data: Mooch's test of the LR2170SA ↗

At the standard 2000 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
2.75VNominal
3.6VMax charge
4.2V

Usable range: 1.5V

C-rate conversion: Lishen LR2170SA (4000mAh)

C-Rate	Current (A)	Theoretical runtime
0.2C	0.8 A	5h 00m
0.5C	2 A	2h 00m
1C	4 A	1h 00m
2C	8 A	30m
3C	12 A	20m

Highlighted row is closest to the rated 12A continuous discharge.

Charging

Rate	Current	Estimated time
0.5C	2,000 mA	~2h 00m
1C	4,000 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.

Datasheet

Download official Lishen LR2170SA datasheet (PDF) ↗

Pack scaling

Series voltage configurations

Config	Nominal V	Max V	Min V	Common use
1S	3.6V	4.2V	2.8V	Flashlights, single-cell devices
2S	7.2V	8.4V	5.5V	RC vehicles, 7.2V packs
3S	10.8V	12.6V	8.3V	Power tools (10.8V nominal)
4S	14.4V	16.8V	11V	Ebike (small), some power tools
7S	25.2V	29.4V	19.3V	Ebike (24V system)
10S	36V	42V	27.5V	Ebike (36V system)
13S	46.8V	54.6V	35.8V	Ebike (48V standard)
14S	50.4V	58.8V	38.5V	Ebike (52V high-power)
16S	57.6V	67.2V	44V	DIY powerwall

Parallel capacity scaling

Config	Capacity	Energy	Max discharge
1P	4,000 mAh	14.4 Wh	12 A
2P	8,000 mAh	28.8 Wh	24 A
3P	12,000 mAh	43.2 Wh	36 A
4P	16,000 mAh	57.6 Wh	48 A
5P	20,000 mAh	72 Wh	60 A
6P	24,000 mAh	86.4 Wh	72 A

Example pack configurations

7S2P

24V ebike / small pack

14 cells25.2V nominal8,000mAh202Wh24A maxCell weight: 0.97 kg (add ~15% for wiring and BMS)

13S4P

48V ebike standard

52 cells46.8V nominal16,000mAh749Wh48A maxCell weight: 3.59 kg (add ~15% for wiring and BMS)

16S4P

DIY powerwall

64 cells57.6V nominal16,000mAh922Wh48A maxCell weight: 4.42 kg (add ~15% for wiring and BMS)

4S6P

Power tool replacement

24 cells14.4V nominal24,000mAh346Wh72A maxCell weight: 1.66 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 PacksGood balance of capacity for range and discharge for hills. Works well in most ebike packs.

Car AudioMight work for smaller setups. Check your amp's peak current draw.

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

FlashlightsHigh capacity means long runtime. Great for everyday carry and extended use.

Power ToolsMay work for lighter-duty tools. Check your tool's current requirements.

Physical dimensions

Dimensions21.7mm × 70.9mm

TopFlat Top

Format21700

Similar cells

Same format and chemistry, within ±500mAh capacity:

Cell	mAh	CDR	Wh	Weight	Wh/kg
Lishen LR2170SA (this cell)	4000	12A	14.4	69g	208.7
BAK 45D	4500	30A	16.2	69g	235
Dmegc 45E	4500	13A	16.2	70g	231
Epoch P45B	4500	45A	16.2	70g	231
Molicel P45B	4500	45A	16.2	70g	231
Samsung INR21700-45T	4500	35A	16.2	72g	225

Build with this cell

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Frequently asked questions

What is the capacity of the Lishen LR2170SA?

What is the maximum discharge rate of the Lishen LR2170SA?

How many LR2170SA cells do I need for a 48V ebike battery?

What does the Lishen LR2170SA weigh?

Can I use the LR2170SA for vaping?

What is the cycle life of the Lishen LR2170SA?

What temperature range can the LR2170SA operate in?

What size is the Lishen LR2170SA?

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 2.75V.
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.