THOR 405050 3.7V 1000mAh lithium polymer battery with PCM protection, red and black lead wires, and 2-pin connector

THOR 405050 3.7V 1000mAh LiPo battery dimension drawing showing T×W×L = 4.0 × 50 × 52 mm (with PCM) and 2-pin connector polarity

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

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Description

Choose THOR-405050 when the enclosure can accept a broad 50 × 50mm footprint but battery thickness should remain near 4mm. Compared with THOR-505050↗, THOR-405050 saves 1mm of nominal cell thickness while providing 1000mAh instead of 1500mAh. If the project can use a narrower footprint, THOR-504050↗ provides the same 1000mAh capacity in a 5 × 40 × 50mm format, trading additional thickness for reduced width. THOR-405050 therefore prioritizes minimum depth and a broad, flat footprint over maximum capacity.

The 4 × 50 × 50mm value describes the bare pouch cell. The current PCM-equipped pack is approximately 4 × 50 × 52mm, so enclosure design should account for the added PCM length, connector body, lead-wire exit and cable bend radius rather than relying only on bare-cell dimensions. The broad 50 × 50mm footprint also means flatness, mounting pressure and mechanical support across the pouch area should be considered in the final device.

At 3.7V nominal, 1000mAh corresponds to 3.7Wh. Runtime depends on the device duty cycle, display or sensor load, wireless activity, regulator efficiency and cutoff voltage. The released datasheet specifies PCM protection, 28AWG leads and PH2.0 as the standard configuration, with NTC optional; final current, connector and temperature-sensing requirements should still be reviewed against the production device.

THOR-405050 Engineering & Fit Questions

What is the finished size of THOR-405050 with PCM?

The bare pouch cell is nominally 4 × 50 × 50mm. The current PCM-equipped assembly is approximately 4 × 50 × 52mm. The finished envelope may vary with PCM placement, insulation, wire exit, connector position and harness routing, so enclosure design should be confirmed against the approved production-intent drawing.

How does THOR-405050 compare with THOR-505050?

Both share a 50 × 50mm footprint. THOR-505050↗ uses 1mm more nominal thickness (5mm vs 4mm) to provide 1500mAh instead of 1000mAh, a 50% capacity increase. Choose THOR-405050 when minimizing battery depth is more important than maximizing runtime.

When should I choose a 4mm 50×50mm pouch instead of a narrower thicker 1000mAh cell?

Choose the broad 4 × 50 × 50mm format when the device enclosure has limited depth but generous footprint area. If the cavity is narrower but can accept more thickness, alternatives like THOR-504050↗ (5 × 40 × 50mm) or THOR-403759↗ (4 × 37 × 59mm) may fit better.

Can THOR-405050 be supplied with NTC?

NTC is optional on this SKU. The standard configuration ships with PCM protection, 28AWG leads and PH2.0 connector. If the device charge controller or battery monitor requires an NTC thermistor, specify this when requesting an OEM sample so the finished pack includes the third wire and appropriate temperature-sensing element.

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-405050
Battery Type	Lithium Polymer (LiPo) pouch cell
Capacity	1000 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-405050 3.7V 1000mAh LiPo Battery – 4×50×50mm

THOR-405050 is a 1S 3.7V 1000mAh lithium polymer battery built around a nominal 4 × 50 × 50mm bare pouch cell, providing 3.7Wh in a broad, ultra-thin 50 × 50mm footprint. The geometry is useful when a device has sufficient battery area but limited internal depth. The current PCM-equipped assembly is approximately 4 × 50 × 52mm; final fit depends on PCM, insulation, connector position, lead exit and cable routing.

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-405050

Mechanical Characteristics

Model	THOR-405050
Cell Type	Lithium Polymer (LiPo) pouch cell
Configuration	1S1P (customizable)
Dimensions (T×W×L)	4 × 50 × 50 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. 21 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	1000 mAh
Energy	3.7 Wh
Charge Voltage	4.20 ± 0.03 V
Standard Charge	200 mA (0.2C), CC/CV to 4.20 V
Charge Cut-off Current	0.02C
Max. Charge Current	1.0 A (up to 1C), model-specific
Discharge Cut-off Voltage	3.0 V
Standard Discharge	200 mA (0.2C)
Max. Continuous Discharge	1.0 A (1C), model-specific
Internal Resistance	≤ 70 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-405050

Portable Home Monitoring DevicesThe ultra-thin 4 × 50 × 50mm geometry can suit compact portable home-monitoring devices using displays, sensors or wireless communication when enclosure depth is more constrained than available footprint area. Confirm sensor/display duty cycle, wireless load and finished-pack fit.

Wireless Handheld ControllersTHOR-405050 can suit slim wireless controllers where the enclosure can accommodate a wide, flat battery cavity but must keep stack height low. Validate BLE or 2.4GHz duty cycle, button/display activity, connector routing and target runtime.

Compact Test & Measurement InstrumentsThe 1000mAh capacity and 4mm nominal thickness can suit small rechargeable measurement devices where broad internal area is available but battery depth is restricted. Confirm sensor, display and peak-load requirements before selection.

Flat Portable Sensor HubsTHOR-405050 can also be considered for compact sensor hubs combining sensing, logging and wireless communication within a shallow enclosure. Verify operating temperature, transmit peaks, finished-pack dimensions and mounting clearance.

WhatsApp / Tel: +86 180 2916 9106

Email: sales@thorbattery.com

Description

THOR-405050 Engineering & Fit Questions

Why Choose THOR Power

Factory Photos

Automation Equipment

Testing Equipment

Warehouse & Certifications

THOR-405050 3.7V 1000mAh LiPo Battery – 4×50×50mm

Get an Engineering Quote

Battery Specification — THOR-405050

Mechanical Characteristics

Typical Applications — THOR-405050

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