01Cell sorting and testing
Cells are sorted by capacity and internal resistance, so a pack works as one unit.
Custom Lithium Battery Packs Built to Your Device
Jetray is a custom battery pack manufacturer in Shenzhen, China. Tell us your voltage, size, interface and certification needs, and our engineers design, test and build the pack. We reply within 24 hours.
15+Years in rechargeable power
200+Employees
20,000+m²Factory area
50+Countries and regions served
01Industries
Battery Packs for Seven Industries
Each industry has its own duty, size limits and documents. Pick yours to see what we build and what to send us.
01Medical devicesGlucose meters, oximeters, breast pumps, medical robots
02Robotics and AGVsAGVs, AMRs, industrial robots, floor cleaners
03Industrial equipmentForklifts, power tools, signal towers
04Energy storage and UPSUPS, off-grid storage, telecom backup
05Light mobilityE-bikes, motorcycles, golf carts, RVs
06Security and IoTSecurity cameras, wearables
07Consumer and portableHeated clothing, drones, speakers, work lights
02Robotics and AGVsAGVs, AMRs, industrial robots, floor cleaners03Industrial equipmentForklifts, power tools, signal towers04Energy storage and UPSUPS, off-grid storage, telecom backup05Light mobilityE-bikes, motorcycles, golf carts, RVs06Security and IoTSecurity cameras, wearables07Consumer and portableHeated clothing, drones, speakers, work lights02Custom solutions
Custom Battery Engineering, from Idea to Batch
We take a device requirement through cell choice, BMS, enclosure, charging, samples and production. You can work with us from a drawing (OEM) or let us propose the design (ODM).
Work from your drawing. Send the drawing or a sample and we build to print.
Let us propose the design. Share the device requirement and we suggest the pack.
01
Development process
The steps from first message to delivery.
→02BMS design
Protection, balancing and communication.
→03Cell selection and sourcing
The right cell for your load.
→04Enclosure design
Sheet metal or plastic, IP65 as the usual level.
→05Charger and communication
CAN, UART, RS485 and Bluetooth.
→06Prototyping and samples
Test a charged sample before the batch.
→07Cost and MOQ
What decides price and order size.
→08OEM and ODM
Build to print, or design with us.
→Explore custom battery solutionsEngineer reply within 24 hours
03Products
Cells, Replacement Packs, Primary Batteries and Solar Storage
Besides custom packs, we supply the products around them.
View all products
Replacement battery packs
Lithium packs that replace lead-acid and light EV batteries
Lithium cells
Cylindrical and polymer cells from Panasonic, Samsung, LG, Molicel and EVE
Primary lithium batteries
Li-SOCl2 and coin cells for meters, IoT and backup
Solar and energy storage
Integrated storage and inverter-battery matching
Electronic components
Capacitors, switches and relays
04Inside the factory
How a Jetray Battery Pack Is Built
Quality is built in at each step, not only checked at the end.
01
02Spot welding and assembly
Nickel strips are welded to carry your device’s current.
03BMS fitting and testing
Protection settings and connections are checked to the specification.
04Pack assembly
Cells, wiring, insulation and enclosure are put together to the drawing.
05Final test and inspection
Finished packs are tested before they are packed.
06Packing and shipping
Labels, cartons and documents are prepared, with your branding if you wish.
05Why Jetray
Why Engineering and Procurement Teams Choose Jetray
Sourcing a custom pack often goes wrong in the same places. This is how we deal with them.
Engineer replyWithin 24 hours
- 01
Unclear requirements lead to a wrong first sampleWe send a checklist and review your drawing or photos before we design
- 02
Slow repliesOur engineers reply within 24 hours
- 03
Samples that do not fit or workYou test a charged sample in your own device, and we adjust before the batch
- 04
Cells that differ from pack to packCells are sorted and matched by capacity and internal resistance
- 05
Documents arrive lateUN38.3, IEC 62133 and MSDS documents are available, with transport and certification reports for the shipment
- 06
Brand and channel needsPrivate label and distributor supply are supported
- 07
Shipping lithium is complicatedWe pack to the rules and ship worldwide from Shenzhen
Custom battery pack samples are charged. Custom packs usually take one to two months, and items in stock ship without waiting. Cost and MOQ →
06Quality & certification
Documents and Testing You Can Ask For
We hold UN38.3, IEC 62133 and MSDS documents, test packs with our own equipment and can send transport and certification reports with your shipment. Tell us your model and market, and we confirm which documents cover it.
UN38.3Transport tests
IEC 62133Battery safety
MSDSMaterial safety data
07Resources
Guides for Battery Buyers and Engineers
Short guides on the choices behind a pack.
Browse all guides→01
Custom battery engineering
BMS, matching, series and parallel, C-rate and testing.
ReadWhat Is a LiFePO4 Battery? Chemistry, Specs, Lifespan and Uses→02
Safety and certification
UN38.3, IEC 62133 and shipping rules.
ReadHeated Clothing Battery Guide: Voltage, Runtime & Safety→03
Chemistry and cell selection
LiFePO4 or NMC, LiPo or Li-ion, cell brands.
Read100Ah LiFePO4 Battery: Runtime, Wiring and What You Can Power→04
Industry guides
What each industry asks of a battery.
ReadGolf Cart Lithium Battery Conversion Kit: Contents and Costs→
08About
Songgang, Bao’an, ShenzhenAbout Jetray
Jetray builds custom lithium battery packs in Songgang Town, Bao’an District, Shenzhen. We work with device makers, brands and distributors, with a team of more than 200 people and a factory of more than 20,000 square meters.
FAQ
Frequently asked questions
We design and build custom lithium battery packs, and also supply lithium cells, primary lithium batteries, replacement packs and solar storage.
The device, voltage, capacity, peak current, size limits, interface, operating conditions, certifications and quantity. Send what you have, and we help fill in the rest.
Custom packs usually take one to two months. Items in stock ship without waiting.
It depends on the product. Coin and button cells are 4,000 pieces. Energy storage products can be supplied even in a few units. Send your quantity and we confirm.
UN38.3, IEC 62133 and MSDS. Tell us the model and we confirm which cover it.
Yes, from Shenzhen to customers everywhere.
09Start a project
Let’s Start Your Custom Battery
Fill in the form or send your requirements. Our engineers reply within 24 hours.
- Engineer reply within 24 h
- UN38.3, IEC 62133, MSDS
- Ships worldwide from Shenzhen
Have a device that needs a pack? Send your voltage, size and quantity.
Request a Quote