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21700NMC Mooch-tested · 40 A

Linkdata 55P

Name: Linkdata 55P Lithium Battery Cell
Brand: Linkdata

Linkdata

Capacity5500 mAh19.8 Wh

Mooch continuous40 ASize to this figure

Voltage window3.6 V2.5 – 4.2 V

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

At 5500 mAh, this ranks #14 of 72 21700 cells in our database. Near the top for capacity among 21700 cells. Top tier for both capacity and discharge. One of the best all-around 21700 cells.

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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
Physical
Form factor	21700
Protected	No
Performance
Capacity	5500 mAh
Energy	19.8 Wh

Independent test data: Mooch's test of the 55P ↗

Voltage operating window

Cutoff
2.5VNominal
3.6VMax charge
4.2V

Usable range: 1.7V

C-rate conversion: Linkdata 55P (5500mAh)

C-Rate	Current (A)	Theoretical runtime
0.2C	1.1 A	5h 00m
0.5C	2.75 A	2h 00m
1C	5.5 A	1h 00m
2C	11 A	30m
3C	16.5 A	20m
5C	27.5 A	12m

Highlighted row is closest to the rated 40A continuous discharge.

Charging

Rate	Current	Estimated time
0.5C	2,750 mA	~2h 00m
1C	5,500 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	5,500 mAh	19.8 Wh	40 A
2P	11,000 mAh	39.6 Wh	80 A
3P	16,500 mAh	59.4 Wh	120 A
4P	22,000 mAh	79.2 Wh	160 A
5P	27,500 mAh	99 Wh	200 A
6P	33,000 mAh	118.8 Wh	240 A

Example pack configurations

7S2P

24V ebike / small pack

14 cells25.2V nominal11,000mAh277Wh80A max

13S4P

48V ebike standard

52 cells46.8V nominal22,000mAh1030Wh160A max

16S4P

DIY powerwall

64 cells57.6V nominal22,000mAh1267Wh160A max

4S6P

Power tool replacement

24 cells14.4V nominal33,000mAh475Wh240A max

Design a custom pack with this cell:

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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 AudioEnough discharge to handle amplifier bursts without voltage sag.

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

FlashlightsHigh capacity means long runtime. Great for everyday carry and extended 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
Linkdata 55P (this cell)	5500	40A	19.8	—	—
Linkdata 60P	6000	60A	21.6	68g	318
Vapcell F60	6000	12A	21.6	74g	292
Reliance RH60	5850	20A	21.1	71g	297
Reliance RS60	5850	50A	21.1	71.5g	295
Lishen LR2170SK	5800	16A	20.9	—	—

Build with this cell

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Frequently asked questions

What is the capacity of the Linkdata 55P?

What is the maximum discharge rate of the Linkdata 55P?

How many 55P cells do I need for a 48V ebike battery?

Can I use the 55P 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.