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3.7V 140mAh-750mAh Ultra-Thin Li-Polymer Battery Cells with 2C Discharge and Protected Design
3.7V 140mAh-750mAh Ultra-Thin Li-Polymer Battery Cells with 2C Discharge and Protected Design
3.7V 140mAh-750mAh Ultra-Thin Li-Polymer Battery Cells with 2C Discharge and Protected Design
3.7V 140mAh-750mAh Ultra-Thin Li-Polymer Battery Cells with 2C Discharge and Protected Design
3.7V 140mAh-750mAh Ultra-Thin Li-Polymer Battery Cells with 2C Discharge and Protected Design
3.7V 140mAh-750mAh Ultra-Thin Li-Polymer Battery Cells with 2C Discharge and Protected Design

3.7V 140mAh-750mAh Ultra-Thin Li-Polymer Battery Cells with 2C Discharge and Protected Design

Ultra-thin 3.7V Li-polymer battery cells for rechargeable battery projects. Standard-model sourcing and OEM/ODM available.

Customizable Parts

  • BMS
  • Cable
  • Connector
  • Terminal
  • Label
  • Packaging

Key Features

  • 3.7V nominal voltage with 4.2V maximum voltage and 2.5V discharge cut-off
  • 140mAh to 750mAh capacities across 11 models
  • 3.0mm to 4.2mm ultra-thin battery profiles
  • 2C maximum continuous discharge rating across included models
  • Protected, rechargeable construction stated for every included model

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Inquiry

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Product Number Battery Type Nominal Voltage Maximum Voltage Discharge Cut-off Voltage Battery Capacity Battery Size Continuous Discharge Rating (max) Protected Rechargeable Approx. Weight Connector
302030PL Li-Polymer 3.7V 4.2V 2.5V 150mAh 20*30*3mm 2C Yes Yes 3.5g Not specified
402030PL Li-Polymer 3.7V 4.2V 2.5V 200mAh 20*30*4mm 2C Yes Yes 4.8g Not specified
402050PL Li-Polymer 3.7V 4.2V 2.5V 400mAh 20*50*4mm 2C Yes Yes 8g 2Pin 2.54 JST Connector
403040PL Li-Polymer 3.7V 4.2V 2.5V 450mAh 30*40*4mm 2C Yes Yes 10g 2Pin 2.0 JST Connector
303040PL Li-Polymer 3.7V 4.2V 2.5V 400mAh 30*40*3mm 2C Yes Yes 8g 2Pin 2.0 JST Connector
303450PL Li-Polymer 3.7V 4.2V 2.5V 500mAh 34*50*3mm 2C Yes Yes 10g 2Pin 2.54 JST Connector
302025 Li-Polymer 3.7V 4.2V 2.5V 140mAh 20*25*3mm 2C Yes Yes Not specified PH1.25, PH1.25/2.0 JST Connector
403048PL Li-Polymer 3.7V 4.2V 2.5V 600mAh 30*48*4mm 2C Yes Yes 13g 2Pin 2.54 JST Connector
403030PL Li-Polymer 3.7V 4.2V 2.5V 300mAh 30*30*4mm 2C Yes Yes 7g Not specified
333440PL Li-Polymer 3.7V 4.2V 2.5V 500mAh 34*40*3.3mm 2C Yes Yes 10g 2Pin 2.54 JST Connector
423450PL Li-Polymer 3.7V 4.2V 2.5V 750mAh 34*50*4.2mm 2C Yes Yes 14g Not specified

3.7V 140mAh-750mAh Ultra-Thin Li-Polymer Battery Cells with 2C Discharge and Protected Design

Delivery & Support

Packaging, battery shipping documents and after-sales handling are reviewed around the product model, order quantity, destination and agreed specification.

Packing

The packing method is selected according to the battery type, size, quantity and shipping route. Project-specific labels and carton details can be reviewed before production.

  • Battery terminals, wires and connectors are protected during packing.
  • Inner protection and carton arrangement are matched to the battery type, dimensions and quantity.
  • The product model, quantity and required handling labels are checked before shipment.
  • Custom labels, carton details and other packaging requirements can be reviewed with the order.

Shipping

KBT can review international battery shipping options according to the destination, battery model and order quantity. The available route, shipping charge and estimated schedule are confirmed with the quotation rather than published as one standard promise.

Available shipping documents

  • UN38.3 report or test summary where applicable
  • MSDS or SDS where applicable
  • Other model-specific transport or shipping documents required for the agreed route

Documents vary by battery model and configuration. Applicable files must be confirmed before ordering.

After-Sales

If a product issue is found after delivery, provide the order reference, affected quantity and a clear description of the issue. Photos, video and test information should be included where available so KBT can compare the product with the agreed specification.

KBT reviews the evidence and cause of the issue. When a product quality issue is confirmed, the resolution is arranged according to the quotation, order confirmation and agreed after-sales terms.

Information needed for an after-sales review

  • Order reference and product model
  • Affected quantity and date the issue was found
  • Description of the operating conditions and observed problem
  • Clear photos, video or available test results

Before ordering: confirm the destination, battery model, quantity, required documents and any special packing instructions. Retail-store shipping and return timeframes do not automatically apply to wholesale or custom projects.

Submit your request to us

And we will contact you within 24 hours

Standard-model or OEM

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FAQs

For more questions visit our help center.

Can this battery pack be customized for my application?

Yes. KBT can evaluate OEM/ODM requirements including voltage, capacity, dimensions, discharge current, cell type, BMS, cables, connectors, terminals and packaging. Please share your application and technical requirements for review.

Can I order a sample before mass production?

Sample or small-batch validation can be arranged according to the product and project requirements. Specifications are confirmed before sampling so performance, fit and compatibility can be evaluated before mass production.

What quality controls are applied to the battery pack?

Quality control covers key stages from incoming materials and cell matching to assembly, performance testing and finished-product inspection. The exact inspection and reliability testing plan depends on the selected model and application.

What certification and shipping documents are available?

Compliance and transport documentation can be reviewed for the specific product, including applicable UN38.3, MSDS, air or sea transport reports and other requested documents. Availability must be confirmed by model and destination market.