Customizable LiPo battery connector and wire harness options, with PH 2.0 mm shown for reference

Lithium polymer (LiPo) battery connector polarity guide showing red positive and black negative wires with correct and incorrect connection examples

THOR lithium polymer (LiPo) battery discharge performance comparison with discharge curves and microscopic electrode material images

↓ Download Product Datasheet (PDF)Request a Quote

Description

THOR-555075 places 2500mAh in a relatively thin 5.5 × 50 × 75mm bare-cell envelope. THOR-505573 is 0.5mm thinner at the same capacity but requires 55mm width, while THOR-556065 keeps the same 5.5mm thickness and capacity in a wider, shorter 60 × 65mm footprint. Choose THOR-555075 when a 50mm width limit matters and the enclosure can accept 75mm bare-cell length.

The 5.5 × 50 × 75mm value is the nominal bare-cell envelope. A typical PCM-equipped assembly is approximately 5.5 × 50 × 77mm, but this is engineering guidance rather than a guaranteed finished tolerance. PCM placement, insulation, lead exit, connector body and wire routing can change the final envelope; confirm the production-intent drawing and sample before enclosure approval.

At 3.7V nominal and 2500mAh, THOR-555075 stores 9.25Wh and uses the standard 1S 4.2V full-charge system. Runtime depends on standby and active load, conversion efficiency, cutoff voltage, duty cycle, temperature and aging. Continuous and peak-current suitability should be confirmed against the final cell, PCM, wire, connector and device load profile.

THOR-555075 Engineering & Fit Questions

How does THOR-555075 compare with THOR-505573 and THOR-556065?

THOR-555075 provides 2500mAh in a 5.5 × 50 × 75mm envelope. THOR-505573↗ is 0.5mm thinner but 5mm wider, while THOR-556065↗ keeps the same thickness and capacity but uses a wider, shorter 60 × 65mm footprint.

Are 5.5 × 50 × 75mm the finished THOR-555075 dimensions?

No. They are nominal bare-cell dimensions. A typical PCM-equipped assembly is approximately 5.5 × 50 × 77mm, but PCM placement, insulation, connector body, lead exit and wire routing can change the final envelope. The finished battery dimensions guide explains the main clearance factors.

What safety and compliance documentation is available for THOR-555075?

Relevant safety and compliance documentation is available for OEM project review. Controlled files are not published for public download, and documentation applicability should be confirmed if the PCM, wiring, connector or finished-pack configuration changes.

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-555075
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

3.7V 2500mAh Lithium Polymer (LiPo) Battery with Connector | THOR-555075

THOR-555075 is a 3.7V 2500mAh LiPo pouch cell with 9.25Wh nominal energy and a relatively thin 5.5 × 50 × 75mm bare-cell envelope. Its broad 50 × 75mm footprint keeps nominal cell depth to 5.5mm for shallow equipment that can allocate plan area. Typical PCM-equipped length is approximately 77mm; final pack fit and load suitability require validation. Relevant safety and compliance documentation is available for OEM project review.

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-555075

Mechanical Characteristics

Model	THOR-555075
Cell Type	Lithium Polymer (LiPo) pouch cell
Configuration	1S1P (customizable)
Dimensions (T×W×L)	5.5 × 50 × 75 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. 43 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-555075

Slim Portable Display & Control Assemblies — PrimaryThe 5.5mm nominal depth and broad 50 × 75mm footprint can suit shallow display or control enclosures that can allocate plan area. Confirm display, processor and wireless duty cycles together with finished-pack clearance.

Portable Diagnostic & Measurement InstrumentsThe 9.25Wh nominal energy may suit portable measurement equipment where shallow battery depth is more important than minimum footprint. Validate acquisition, display, communication and standby loads.

Flat Communication & Data TerminalsTHOR-555075 may suit thin portable terminals built around a broad battery bay after pulse load, connector position, wire routing and the complete protected-pack envelope are confirmed.