01Cell matching
Cells are sorted by capacity and internal resistance, so a pack works as one unit.
Custom lithium battery packs for device makers · Made in Shenzhen, shipped worldwide
Custom lithium battery packs for portable medical devices.
Explore medical device →
Medical DeviceCustom lithium battery packs for AGVs, AMRs and service robots.
Explore robotics and agv →
Robotics and AGVCustom lithium battery packs for forklifts, power tools, signal towers and test equipment.
Explore industrial equipment →
Industrial EquipmentCustom LiFePO4 battery packs for backup power, telecom backup, UPS and off-grid storage.
Explore energy storage and ups →
Energy Storage and UPSCustom lithium battery packs for e-bikes, motorcycles, golf carts and RVs.
Explore light mobility →
Light MobilityCustom lithium battery packs for security cameras, sensors, trackers and wearables.
Explore security and iot →
Security and IoTCustom lithium battery packs for heated apparel, drones, audio, lighting and small appliances.
Explore consumer and portable →
Consumer and Portable
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 delivery→
BMS DesignProtection, balancing and data to your device→
Cell Selection & SourcingLi-ion, LiFePO4 or LiPo from leading brands→
Prototyping & SamplesCharged samples you test before the batch→
OEM / ODMYour spec or our design, under your brand→
Cost & MOQWhat drives price and minimum order→Custom lithium replacement packs for lead-acid batteries and light EVs.
Explore replacement →
ReplacementCylindrical and polymer lithium cells from Panasonic, Samsung, LG, Molicel and EVE for pack builders and device makers.
Explore lithium cells →
Lithium Cells
Primary LithiumSolar storage with inverter and lithium battery matched to each other.
Explore solar & energy storage →
Solar & Energy StorageCapacitors, switches and relays from Panasonic and Murata that go with battery products.
Explore electronic components →
Electronic Components
Jetray designs and builds custom lithium battery packs in Shenzhen, China. We work with device makers, brands and distributors who need a pack made to their voltage, size, interface and certification needs.
Our factory is in Songgang Town, Bao’an District, Shenzhen. This is where your pack is matched, welded, assembled and tested.







We turn a device requirement into a working battery pack, and then into a repeatable product. That covers:
Cell matching, spot welding, assembly and packing in our own factory.
Samples, batch production and worldwide shipping from Shenzhen.
We build to your drawing (OEM) or propose the design for you (ODM).OEM and ODM →




DesignDrag or use the arrows to follow a pack through our factory.
01Cells are sorted by capacity and internal resistance, so a pack works as one unit.
02Nickel strips are welded to the cells to carry the current of your device.
03Cells, BMS, wiring, insulation and enclosure are put together to the drawing.
04Each pack is checked before it leaves the line.
05Labels, cartons and shipping documents are prepared, with your branding if you wish.
06UN38.3, IEC 62133 and MSDS documents are available for the model you buy.

We pick the cell for your load and conditions, and tell you what we recommend and why.
Cell selection and sourcing →
→Medical Device BatteriesPortable medical devices
→Robotics and AGV BatteriesAGVs, AMRs and service robots
→Industrial Equipment BatteriesForklifts, power tools, signal towers and test equipment
→Energy Storage and UPSBackup power, telecom backup, UPS and off-grid storage
→Light Mobility BatteriesE-bikes, motorcycles, golf carts and RVs
→Security and IoT BatteriesSecurity cameras, sensors, trackers and wearables
→Consumer and Portable BatteriesHeated apparel, drones, audio, lighting and small appliances
Our customers are device makers, brands and distributors. We support private label, so a pack can carry your name and model number. We also supply in-stock items that ship without waiting. Custom battery packs usually take one to two months, and custom battery pack samples are charged.

We listen, customize and work with you on the pack.
We do not trade safety or reliability for price.
We keep improving materials, design and how we build.
We tell you plainly what we can and cannot do, so the relationship lasts.

Our factory is in Songgang Town, Bao’an District, Shenzhen, China. We ship to customers worldwide.



Send your requirements. Our engineers reply within 24 hours.
Hi there 👋 Looking for a custom power solution?
Tell us what your device needs. Our engineers reply within 24 hours. This helps us quote faster:
Not sure about some of these? Send what you have. We will help fill in the rest.