GEB 303040 3.7V 320mAh Lithium Polymer (LiPo) Battery Cell (3×30×40mm)

Name: GEB 303040 3.7V 320mAh Lithium Polymer (LiPo) Battery Cell (3×30×40mm)
Brand: GEB
Price: 12.30 USD
Availability: PreOrder

Grade-A GEB 303040 3.7V 320mAh Lithium Polymer (LiPo) Battery Cell (3×30×40mm) (3.7V, 320mAh) pouch cell engineered for Smart glasses, handheld barcode scanners, POS terminals, Bluetooth audio, and portable medical diagnostic pens with ultra-low IR, optional PCM circuit, and UN38.3 documentation where applicable.

Lithium Polymer Battery

B2B Engineering Review & Pricing

Direct manufacturer supply, custom BMS telemetry, and CAD fit validation for OEM/ODM projects.

⚡ Send Inquiry 📄 Request Datasheet & Pinout

✔ Response target: Target response within 12 business hours during business hours; timing varies by inquiry complexity and working hours.

✔ Typical Lead Time: 7–10 business days for prototypes; 15–20 business days for mass production after final specification approval. Final timing is confirmed after tooling, testing, and order review.

✔ Shipping documentation: Applicable UN38.3 test documentation, MSDS/SDS, CE and Class 9 dangerous-goods requirements are confirmed per selected configuration and shipment.

Product Details

Direct Answer / Engineering Summary

The GEB 303040 3.7V 320mAh Lithium Polymer (LiPo) Battery Cell (3×30×40mm) is a high-reliability compact Lithium Polymer (LiPo) pouch cell delivering a verified 3.7V nominal working voltage and 320mAh rated capacity (1.184Wh). Featuring an ultra-slim 3.0mm aluminum-laminated pouch structure, this cell provides high volumetric energy density with stable voltage plateaus and tight internal impedance control. Engineered for smart eyewear, handheld barcode scanners, mobile POS payment terminals, and portable medical diagnostic pens, device integrators should verify enclosure clearance allowing 8%–10% cyclic swelling buffer and specify custom lead length and connector options prior to volume manufacturing.

Engineering Overview

Product Overview

The GEB 303040 3.7V 320mAh Lithium Polymer (LiPo) Battery Cell (3×30×40mm) is a Grade-A flexible pouch lithium polymer cell engineered for space-constrained electronic hardware. Delivering 3.7V nominal voltage and 320mAh rated capacity, this cell utilizes advanced high-energy-density stacking technology, ultra-pure electrolyte formulation, and low internal impedance. Featuring physical dimensions of 3.0 × 30.0 × 40.0 mm (±0.3mm) with a net weight of approximately 8.4g ± 0.5g, it is targeted for smart glasses, handheld barcode scanners, POS terminals, Bluetooth audio headsets, and portable medical diagnostic instruments. Prior to housing integration, verify battery compartment clear dimensions (allow 8%–10% thickness swelling buffer over cycle life), required wire length, and connector model.

Quick Reference

Product Specifications

Feature / Attribute	Technical Specification
Battery Chemistry	Lithium Cobalt Oxide / NCM Polymer (LiPo Pouch)
Nominal Voltage & Capacity	3.7V / 320mAh (1.184Wh)
Physical Dimensions & Weight	3.0 × 30.0 × 40.0 mm (±0.3mm) / Approx. 8.4g ± 0.5g
Continuous Discharge Rating	1.0C (320mA continuous discharge)
Peak Pulse Discharge	2.0C (640mA pulse ≤ 5s)
Target Applications	Smart glasses, handheld barcode scanners, POS terminals, Bluetooth audio, and portable medical diagnostic pens
Standard Terminals	Bare nickel tabs / optional PCM with JST, Molex, or fine solder leads
Baseline Cycle Life	≥ 500–800 cycles (@ 80% DoD, 25°C, 0.5C/0.5C)

Engineering Data

Technical Specifications

Parameter	Value	Test Conditions & Engineering Tolerances
Nominal Voltage	3.7V	Standard measurement @ 25°C, 0.2C discharge
Upper Charge Voltage Cutoff	4.20V ± 0.02V	CC/CV charge mode, 0.02C termination current
Discharge Lower Cutoff	3.00V ± 0.03V	PCM / Controller automatic low-voltage cutoff
Standard Charge Current	0.2C – 0.5C (64mA to 160mA)	Max recommended fast charge: 1.0C (320mA)
Internal AC Resistance (1kHz)	≤ 45 mΩ	1kHz AC test @ 25°C fully charged state
Cell Consistency Screening	ΔV ≤ 3mV \| ΔR ≤ 1.5mΩ	Pre-assembly automated barcode classification
Operating Temperature Range	Charge: 0~45°C \| Discharge: -10~55°C	Storage: 15~25°C (60% SoC storage)

Engineering Validation

Equipment Compatibility & Engineering Fit Check

Before deploying GEB 303040 3.7V 320mAh Lithium Polymer (LiPo) Battery Cell (3×30×40mm), verify these verified electrical and mechanical boundary requirements:

☑

Voltage & Charge Cutoff: Nominal 3.7V (charging CC/CV cutoff at 4.2V); confirm charger algorithm strictly matches this chemistry.

☑

Capacity & Energy Budget: Rated at 320mAh; verify system run-time calculations under planned discharge currents.

☑

Physical Envelope: Specified at 3.0 × 30.0 × 40.0 mm (±0.3mm); allow 5–10mm buffer in battery tray for expansion and lead harness.

☑

Cycle Reliability: Verified for ≥ 500–800 cycles (@ 80% DoD, 25°C, 0.5C/0.5C) under controlled DOD and thermal management.

💡 Custom Engineering Fit: Contact our Shenzhen engineering team to verify CAD models, custom wire leads, or BMS CANbus telemetry for this product.

Operational Suitability

Operational Boundary Conditions

✔ Recommended Fit & Use Cases:

Electronic devices and OEM packs matched with 3.7V / 320mAh power curves.
Commercial designs requiring high volumetric energy density and predictable discharge curves.
Projects requiring batch consistency with automated barcode impedance sorting.

⚠ Operational Constraints & Limits:

Do not discharge below minimum cutoff voltage or charge beyond 4.2V.
Maintain operational surface temperature within -20°C to +60°C discharge (0°C to +45°C charge).
Ensure connector polarity and pin assignment match system schematics prior to initial power-up.

First-Party Standards

First-Party Manufacturing SOP & Export Compliance

🏭 Automated Grading & Matching Cells classified via automated OCV/ACIR sorting (ΔV ≤ 2–3mV, ΔR ≤ 1.2mΩ) for tight pack balance.

🔬 Joint Integrity & Testing Laser or ultrasonic busbar welding with destructive pull test validation ≥ 5.0–8.0 kgf per terminal.

📦 Full Cycle Aging Verification 100% full charge-discharge cycle screening and thermal imaging prior to warehouse dispatch.

🌐 Export & Regulatory Clearance Supplied with certified UN38.3 test summaries, MSDS, 1.2m drop reports, and Class 9 DG shipping documentation.

Turnaround: 7–10 days prototypes; 15–20 days mass production per custom tooling requirements. View Verified Manufacturing Equipment & Testing Facility →

Decision Support

Technical Whitepapers & Engineering Guides

Complete Guide Read Guide →

What is a LiPo Battery [2026 Complete Engineering Guide]

In-depth overview of polymer chemistry, pouch packaging safety, high energy density, and custom geometric form factors.

Specs Decoded Read Guide →

Understanding S, P, and C in LiPo Battery Specs Explained

Clear technical guide to cell series/parallel architectures, voltage multiplication, and continuous vs burst discharge ratings.

Safety & Limits Read Guide →

Basics of Battery Discharging: C-Rate, Cutoff Voltage and Safety Limits

Critical operating boundaries, recommended depth of discharge (DoD), and thermal limits to prevent swelling and cycle degradation.

⚙ Engineering FAQ & B2B Procurement Specifications

What is the turnaround time for custom battery pack prototypes and mass production for GEB 303040 3.7V 320mAh Lithium Polymer (LiPo) Battery Cell (3×30×40mm)?

Custom prototype development typically requires 7 to 10 business days after CAD drawing approval and technical specification freeze. Commercial mass production turnaround is typically 15 to 20 business days. Standard OEM minimum order quantities (MOQ) start at 50 to 100 units depending on cell chemistry, custom mold tooling, and casing complexity.

Does GEB provide UN38.3 test summaries, MSDS, and Class 9 dangerous goods export compliance?

Yes. General Electronics Technology (GEB) provides complete first-party compliance verification for all industrial battery packs, including UN38.3 test reports, 1.2m drop test appraisal certificates, MSDS/SDS sheets, and certified dangerous goods packaging compliant with IATA air transport and IMDG maritime shipping regulations.

What smart telemetry protocols and BMS protection features are supported?

Our custom smart BMS architectures support industry-standard communication protocols including UAVCAN, CANbus 2.0B, SMBus, UART, and RS485. Integrated hardware protections include multi-tier over-voltage, over-discharge, continuous over-current, short-circuit, and dual-channel NTC thermal cutoff safeties with active cell balancing options.

What are the recommended continuous and peak burst discharge margins?

To maximize lifecycle endurance and electrochemical stability, we recommend designing with a 15% to 20% continuous discharge headroom margin under typical operating loads. Peak burst discharge ratings should strictly adhere to specified duration windows (typically ≤10 seconds) while ensuring pack operating temperatures remain below 65°C.