Custom lithium battery packs, engineered to spec.
From cell selection and BMS design to certified mass production — one engineering partner for medical, robotics, industrial and energy-storage power.
Trusted by OEMs worldwide
A chemistry for every requirement
Standard or fully custom — choose the cell type and format that fits your voltage, size and environment.
Prismatic Cell
Prismatic-format cells for high energy density, robust mechanical design and scalable energy-storage applications.
Cylindrical Cell
Cylindrical cells for compact, high-power battery applications.
Lithium Polymer
Thin, light pouch cells for wearables and slim products.
FPV / Drone Battery
6S battery packs for FPV and UAV projects.
Explosion-Proof Battery
Passes puncture and impact tests for hazardous environments.
Solid-State Battery
Next-gen high-density chemistry for safety-critical use.
Built for demanding applications
100+ projects across 20+ industries where failure isn't an option.
Custom battery projects in the field
A selection from the 100+ packs we've engineered across industries.
A 50 MWh facility built for custom work
From automated cell sorting and laser welding to climate, safety and cycle-life testing — and we welcome factory tours from clients and partners worldwide.
ISO-certified lines
ISO 9001 / 13485 production
In-house testing
30+ validation tests
Tier-1 cells
Audited global suppliers
Fast prototyping
Sample in days, not weeks
One partner, end-to-end custom power
We take your application from spec sheet to certified, packed-and-shipped battery packs — every step in-house.
From inquiry to your warehouse
About Raysun Battery
Raysun Battery is the website of RAYSUN ENERGY LIMITED. Browse lithium battery cells and battery packs by model, compare published specifications and access available datasheets.
For a quotation, send the model, quantity, application and destination. Pricing, availability, lead time and the documents available for the proposed shipment are confirmed during your inquiry. Browse the battery catalog or contact Raysun.
Battery selection and sourcing guides
Compare model specifications and prepare your purchase inquiry with our EVE LiFePO4 cell sourcing guide · FPV battery pack selection guide.
Tell us what you need powered
Send your specs and target market — you'll get a quote and lead time within one business day.