✱ Render

21.7 × 70.8 mm · 72 g

21700NMC Mooch-tested · 50 A

Great Power 50Q

Name: Great Power 50Q Lithium Battery Cell
Brand: Great Power

Great Power

Capacity5000 mAh18 Wh · 250 Wh/kg

Mooch continuous50 ASize to this figure

Resistance5 mΩDC internal resistance

Voltage window3.6 V2.5 – 4.2 V

Standard charge5000 mA~1 h to full

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

At 5000 mAh, this ranks #19 of 72 21700 cells in our database. Mid-range 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	50A (Mooch-tested)
Mooch CDR (trusted)	50 A
Standard charge current	5000 mA
Internal resistance	5 mΩ
Physical
Form factor	21700
Dimensions	21.7mm × 70.8mm
Weight	72 g
Top type	Flat Top
Protected	No
Performance
Capacity	5000 mAh
Energy	18 Wh
Specific energy	250 Wh/kg
Energy density	687.43 Wh/L
Power density (gravimetric)	2,500 W/kg
Power density (volumetric)	6,874 W/L

Independent test data: Mooch's test of the 50Q ↗

At the standard 5000 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: Great Power 50Q (5000mAh)

C-Rate	Current (A)	Theoretical runtime
0.2C	1 A	5h 00m
0.5C	2.5 A	2h 00m
1C	5 A	1h 00m
2C	10 A	30m
3C	15 A	20m
5C	25 A	12m
8C	40 A	7m 30s
10C	50 A	6m

Highlighted row is closest to the rated 50A continuous discharge.

Charging

Rate	Current	Estimated time
0.5C	2,500 mA	~2h 00m
1C	5,000 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	5,000 mAh	18 Wh	50 A
2P	10,000 mAh	36 Wh	100 A
3P	15,000 mAh	54 Wh	150 A
4P	20,000 mAh	72 Wh	200 A
5P	25,000 mAh	90 Wh	250 A
6P	30,000 mAh	108 Wh	300 A

Example pack configurations

7S2P

24V ebike / small pack

14 cells25.2V nominal10,000mAh252Wh100A maxCell weight: 1.01 kg (add ~15% for wiring and BMS)

13S4P

48V ebike standard

52 cells46.8V nominal20,000mAh936Wh200A maxCell weight: 3.74 kg (add ~15% for wiring and BMS)

16S4P

DIY powerwall

64 cells57.6V nominal20,000mAh1152Wh200A maxCell weight: 4.61 kg (add ~15% for wiring and BMS)

4S6P

Power tool replacement

24 cells14.4V nominal30,000mAh432Wh300A maxCell weight: 1.73 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 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.

Physical dimensions

Dimensions21.7mm × 70.8mm

TopFlat Top

Format21700

Similar cells

Same format and chemistry, within ±500mAh capacity:

Cell	mAh	CDR	Wh	Weight	Wh/kg
Great Power 50Q (this cell)	5000	50A	18	72g	250
Linkdata 55P	5500	40A	19.8	—	—
Samsung INR21700-55E	5490	10A	19.8	—	—
BAK 53E	5300	10A	19.1	69g	277
Samsung INR21700-53G	5300	10A	19.1	72g	265
LG M50T	5014	14A	18.1	70g	258

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 Great Power 50Q?

What is the maximum discharge rate of the Great Power 50Q?

How many 50Q cells do I need for a 48V ebike battery?

What does the Great Power 50Q weigh?

Can I use the 50Q for vaping?

What size is the Great Power 50Q?

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.