↓ Download Product Datasheet (PDF)Request a Quote

Description

The THOR-903659 is the 9 × 36 × 59mm, 2500mAh option for designs that need 9.25Wh in a medium-width pouch near 60mm long. Compared with THOR-903759, it keeps the same thickness, length and capacity while saving 1mm of width. The real project alternatives THOR-654060 and THOR-804050 are thinner 1800mAh formats with different footprints, so THOR-903659 is the higher-energy choice when the enclosure accepts its 9mm thickness.

A current development program selected THOR-903659 for a portable agricultural and irrigation test instrument after the earlier THOR-103750 direction was reconsidered. The published 9 × 36 × 59mm dimensions are for the bare cell; the current specification shows approximately 2mm additional length with the PCM board. Connector, lead exit, wire length and the final protected-pack envelope must be confirmed against the enclosure before sample approval.

At 3.7V nominal and 2500mAh, this cell stores 9.25Wh. Usable runtime still depends on the instrument load profile, regulator efficiency, cutoff voltage, display and radio duty cycle, temperature and aging. Capacity and geometry do not by themselves establish peak or continuous-current capability, so the actual test cycle should be reviewed during engineering validation.

THOR-903659 Engineering & Fit Questions

How does THOR-903659 compare with THOR-903759?

Both are 2500mAh and 9 × 59mm in thickness and length. THOR-903759↗ is 37mm wide, while THOR-903659 is 36mm wide, making the latter preferable when one millimeter of enclosure width matters.

How do THOR-654060 and THOR-804050 differ from THOR-903659?

THOR-654060↗ and THOR-804050↗ are 1800mAh alternatives with lower thickness or different proportions. THOR-903659 provides 2500mAh but requires a 9mm-thick space. Choose from the available cavity depth, footprint and required energy, then confirm the finished-pack envelope before sample approval.

Are 9 × 36 × 59mm the finished battery dimensions?

They are the published bare-cell dimensions. The current specification indicates approximately 2mm additional length with the PCM board; connector, wire routing, insulation and tolerances must also be included in the final enclosure check.

Stable 3.7 V nominal output for reliable power delivery
Long cycle life — typically several hundred cycles, cost-efficient
Built-in protection: overcharge, over-discharge, short-circuit
Custom size, capacity, connector & PCM/BMS
UN38.3 / MSDS ready; CE, KC, ROHS on request

Why Choose THOR Power

A vertically integrated lithium battery manufacturer (Dengzhou Xinju New Energy) with the scale and engineering depth to deliver custom LiPo cells reliably at volume.

3 factories, 800+ staff

Source-manufacturer scale — not a trading company.

200+ engineers

R&D led by a chief battery scientist for rapid custom design.

60,000 pouch cells / day

High-volume manufacturing with products exported across the US, Europe, Japan & Korea, SE Asia, Latin America and Africa.

End-to-end quality control

From raw material to finished cell.

Factory Photos

Automation Equipment

Testing Equipment

Warehouse & Certifications

Model	THOR-903659
Battery Type	Lithium Polymer (LiPo) pouch cell
Capacity	2500 mAh
Certifications	UN38.3 / MSDS (IEC 62133-2, CE, KC on request)
MOQ	From 10 pcs for samples; production quoted per project
Customization	Size, capacity, connector, wire length, PCM/BMS, NTC, label

THOR-903659 3.7V 2500mAh LiPo Battery – 9×36×59mm

The THOR-903659 is a 2500mAh 3.7V lithium polymer battery (9.0×36×59mm), delivering 9.25Wh at ~40.2g. Dense 36×59mm rectangular form — balanced 2500mAh design. One of 17 2500mAh variants — see also THOR-104050, THOR-123252, THOR-163543, THOR-366890 for alternative dimensions. Ideal for walkie-talkie battery and field radio power cell. Volumetric density: 0.48 Wh/cm³.

Wholesale Pricing (USD)

Order Quantity	Reference Unit Price
10 – 99 pcs	—
100 – 999 pcs	—
1,000 – 9,999 pcs	—
10,000+ pcs	Contact for best price

Reference pricing for this model is being finalised. Talk to a Battery Engineer for a same-day quote.

Prices are for standard configuration reference only. Final pricing may vary by cell size, capacity, connector, wire length, PCM/BMS, label, packaging, certification requirements, and order quantity. Shipping cost is not included. MOQ: from 10 pcs for samples; production quantities are quoted per project.

Get an Engineering Quote

Custom sizes, capacities, connectors & PCM/BMS available. MOQ-friendly. Samples in days.

Battery Specification — THOR-903659

Mechanical Characteristics

Model	THOR-903659
Cell Type	Lithium Polymer (LiPo) pouch cell
Configuration	1S1P (customizable)
Dimensions (T×W×L)	9 × 36 × 59 mm (bare cell)
Dimension Tolerance	Thickness ±0.2 mm; Width/Length ±0.5 mm
With PCM Board	Length approx. +2 mm vs bare cell
Weight	Approx. 40 g
PCM / BMS	Included (standard)
NTC Thermistor	Optional
Connector	PH2.0 / Molex 1.25 (custom available)
Wire Length	Customizable
UN38.3	Test Summary available
Safety Data Sheet	SDS / MSDS available
IEC 62133-2	Available for selected models
RoHS / REACH	Compliance documents available

Electrical Specifications

Nominal Voltage	3.7 V
Rated Capacity	2500 mAh
Energy	9.25 Wh
Charge Voltage	4.20 ± 0.03 V
Standard Charge	500 mA (0.2C), CC/CV to 4.20 V
Charge Cut-off Current	0.02C
Max. Charge Current	2.5 A (up to 1C), model-specific
Discharge Cut-off Voltage	3.0 V
Standard Discharge	500 mA (0.2C)
Max. Continuous Discharge	2.5 A (1C), model-specific
Internal Resistance	≤ 45 mΩ (1 kHz, 50% SOC, 25℃)
Cycle Life	≥ 500 cycles, ≥ 80% capacity
Cycle Test Condition	0.5C charge / 0.5C discharge, 3.0-4.2 V, 25 ± 2℃
Charge Temperature	0℃ ~ 45℃
Discharge Temperature	-20℃ ~ 60℃
Storage Temperature	-10℃ ~ 45℃ (≤ 1 month)
Capacity Retention	≥ 90% after 28 days @ 25℃
Note	Higher discharge-rate designs available upon engineering review

Protection Circuit (when PCM equipped)

Overcharge Detection	4.28 ± 0.03 V per cell
Overcharge Release	4.08 ± 0.05 V
Over-discharge Detection	2.75 ± 0.05 V
Over-discharge Release	3.00 ± 0.05 V
Overcurrent Protection	Per PCM design (2A ~ 5A typical)
Short-circuit Protection	Yes, auto-recovery

Values shown are THOR Power standard specifications for this cell class. Final parameters are confirmed in the engineering datasheet for your configuration.

Typical Applications — THOR-903659

Portable Agricultural & Irrigation Test InstrumentsPrimary fit supported by a real development program requiring a rechargeable field instrument with 2500mAh in a 36 × 59mm footprint. Confirm enclosure clearance and the complete operating load before approval.

Professional Handheld Test EquipmentSuitable where a handheld meter or analyzer can accommodate the 9mm thickness and benefits from 9.25Wh of nominal energy.

Portable Data Loggers with Wireless ReportingA candidate for field data loggers with sensing and periodic radio activity after peak-load, runtime and environmental validation.