Battery Building ToolsCell Database 35HP

✱ Render

18.5 × 65.2 mm

18650NMC Mooch-tested · 10 A

Sinowatt 35HP

Name: Sinowatt 35HP Lithium Battery Cell
Brand: Sinowatt

Sinowatt · released 2023

Capacity3350 mAh12.06 Wh

Mooch continuous10 ASize to this figure

Resistance30 mΩDC internal resistance

Voltage window3.6 V2.5 – 4.2 V

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

At 3350 mAh, this ranks #14 of 279 18650 cells in our database. Near the top for capacity among 18650 cells. More capacity than 95% of 18650 cells in our database. One of the higher-capacity options.

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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	10A (Mooch-tested)
Mooch CDR (trusted)	10 A
Internal resistance	30 mΩ
Physical
Form factor	18650
Dimensions	18.5mm × 65.2mm
Top type	Flat Top
Protected	No
Wrap color	Grey
Performance
Capacity	3350 mAh
Energy	12.06 Wh
Energy density	688.12 Wh/L
Power density (volumetric)	2,054 W/L
Year released	2023

Independent test data: Mooch's test of the 35HP ↗

Voltage operating window

Cutoff
2.5VNominal
3.6VMax charge
4.2V

Usable range: 1.7V

C-rate conversion: Sinowatt 35HP (3350mAh)

C-Rate	Current (A)	Theoretical runtime
0.2C	0.67 A	5h 00m
0.5C	1.68 A	2h 00m
1C	3.35 A	1h 00m
2C	6.7 A	30m
3C	10.05 A	20m

Highlighted row is closest to the rated 10A continuous discharge.

Charging

Rate	Current	Estimated time
0.5C	1,675 mA	~2h 00m
1C	3,350 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	3,350 mAh	12.1 Wh	10 A
2P	6,700 mAh	24.1 Wh	20 A
3P	10,050 mAh	36.2 Wh	30 A
4P	13,400 mAh	48.2 Wh	40 A
5P	16,750 mAh	60.3 Wh	50 A
6P	20,100 mAh	72.4 Wh	60 A

Example pack configurations

7S2P

24V ebike / small pack

14 cells25.2V nominal6,700mAh169Wh20A max

13S4P

48V ebike standard

52 cells46.8V nominal13,400mAh627Wh40A max

16S4P

DIY powerwall

64 cells57.6V nominal13,400mAh772Wh40A max

4S6P

Power tool replacement

24 cells14.4V nominal20,100mAh289Wh60A 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 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

Dimensions18.5mm × 65.2mm

TopFlat Top

Format18650

Similar cells

Same format and chemistry, within ±500mAh capacity:

Cell	mAh	CDR	Wh	Weight	Wh/kg
Sinowatt 35HP (this cell)	3350	10A	12.06	—	—
Vapcell F38	3800	10A	13.7	48g	285
Vapcell N36	3650	8A	13.1	48g	274
LG LGEBMJ11865	3500	10A	12.7	49g	260
LG LGDBMJ11865	3500	10A	12.7	49g	259
AWT AWT 35A 3500mAh	3500	35A	12.6	—	—

Build with this cell

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Frequently asked questions

What is the capacity of the Sinowatt 35HP?

What is the maximum discharge rate of the Sinowatt 35HP?

How many 35HP cells do I need for a 48V ebike battery?

Can I use the 35HP for vaping?

What size is the Sinowatt 35HP?

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.