Custom lithium battery packs for device makers · Made in Shenzhen, shipped worldwide

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01 / 07

Medical Device Batteries

Custom lithium battery packs for portable medical devices.

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Custom solutionsFrom your spec to a tested batchCells, BMS, case, charger and label, built around your device.See how we work
Development ProcessFive stages from your brief to batch deliveryBMS DesignProtection, balancing and data to your deviceCell Selection & SourcingLi-ion, LiFePO4 or LiPo from leading brandsPrototyping & SamplesCharged samples you test before the batchOEM / ODMYour spec or our design, under your brandCost & MOQWhat drives price and minimum order
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Replacement Battery Packs

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1s Li Ion Polymer 300mah 3.7v
Lithium Polymer Cells

1s Li Ion Polymer 300mah 3.7v

1SLi-ion polymerENCOREOEM / ODM

This 3.7V 300mAh Li-ion polymer battery pack (1S) is built by Jetray Battery for drones and RC models, wearables and portable electronics, medical and handheld devices. Cells, BMS settings, connector, wiring and housing can all be built to your specification.

  • Nominal voltage3.7V
  • Capacity0.3Ah
  • Energy1.1Wh
  • Weight9.5g
  • Fully customizableVoltage, capacity, BMS, housing
  • Documents readyDatasheet, MSDS, UN38.3
  • 24-hour replyDirect from our engineers
Specifications

Technical data

Standard model values. Every parameter below can be adjusted for your project.

Configuration1S
Nominal Voltage3.7V
Capacity300mAh
Battery Model602030
ChemistryLi-ion polymer
CellENCORE
Cycle Life500 cycles / Over 300 Times
Dimensions6×20×30mm
Weight9.5g
Operating Temperature-10~+50
CertificationISO9001 / ISO14001
Warranty12 Months
ColorSilver or customized color

Temperature window °C

Operating-10 to 50 °C
-102050
Need different specs?

Send your voltage, capacity, current and size limits. We build packs to your drawing.

Applications

Where it is used

Drones and RC models
Wearables and portable electronics
Medical and handheld devices
Robotics and smart devices
Customization & BMS

Built around your equipment

Voltage, capacity, size, BMS and communication can all be changed for OEM / ODM projects. Start from this model or from your own drawing.

FAQ & safety

Common questions

We offer Li-ion (NCM / NCA), LiFePO4 and LTO cells, chosen to match your project needs.

Yes. We provide structural design so the pack fits your housing, connector and mounting points.

Overcharge, over-discharge, overcurrent, short-circuit and temperature protection, SOC / SOH display and communication protocols such as CAN and RS485.

Yes. Charging rates from 0.5C to 2C are possible, depending on the cell specification.

Typically 12–36 months, depending on the project agreement.

Keep them at 50–60% state of charge in a dry, ventilated place between −10 °C and 35 °C.

Safe handling

Heat and damage

Never heat, disassemble or modify the battery, or dispose of it in a fire. Do not pierce, hit, step on or drop it.

If fluid leaks

Do not touch it with bare hands. Rinse eyes, mouth or skin with clean water, see a doctor if needed and contact Jetray after-sales.

Keep it dry

Do not get the battery wet.

Storage conditions

Do not use or store the battery in direct sunlight, high heat or humidity, a hot car, or near heat sources.

OEM & custom packs

Ready to power your next project?

Tell us your voltage, capacity, size and application. Our engineers reply within 24 hours with a design proposal and quotation.

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