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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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
01 / 05

Replacement Battery Packs

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18650 3000mAh 15A discharge Samsung INR18650-30Q Li-ion Rechargeable Battery Cell
Cylindrical Cells

18650 3000mAh 15A discharge Samsung INR18650-30Q Li-ion Rechargeable Battery Cell

Li-ionSamsungOEM / ODM

This Samsung 18650 cylindrical cell (INR18650-30Q) is a Li-ion rechargeable cell rated at 3.6V 3000mAh, supplied by Jetray Battery. We supply it as single cells for your production line or assemble it into finished packs with BMS, wiring and housing. Typical uses include custom battery pack assembly, flashlights and portable lighting, power tools and small appliances.

  • Nominal voltage3.6V
  • Capacity3Ah
  • Energy10.8Wh
  • Max discharge15A
  • 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.

Nominal Voltage3.6V
Capacity3000mAh
Battery ModelINR18650-30Q
ChemistryLi-ion
CellSamsung
Minimum Capacity2900mAh
Charge Cut-off Voltage4.20±0.05V
Discharge Cut-off Voltage2.5V
Charging MethodCC-CV
Standard Charge Current1500mA
Max Continuous Discharge Current15A
DimensionsDiameter 18.4mm × Length 65.0mm
Weight48.0g
Operating TemperatureCharge: 0 to +50°C Discharge: -20 to +75°C Storage: -30 to +60°C
Standard Charging Time180 minutes

Voltage window 2.5 – 4.2 V

2.5 V cut-off3.6 V nominal4.2 V full

Temperature window °C

Operating0 to 50 °C
02550
Need different specs?

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

Applications

Where it is used

Custom battery pack assembly
Flashlights and portable lighting
Power tools and small appliances
IoT, smart home and handheld 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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