Condition is hard to see
State of health and remaining useful life vary widely between packs of the same model, and BMS data is often incomplete or locked.
Partner network
reBattery
Know what every battery is worth, and where it goes next.
reBattery tests, grades and predicts the remaining life of energy-storage and traction batteries, then manages each one to its best next use. Circunar runs the diagnostics, the digital battery passport and the black mass trade. Partners do the refurbishment and material recovery.
- Batteries
- Stationary storage, EV and robot traction packs
- Circunar delivers
- Testing, life prediction, passport and recovery management
- Partners deliver
- Refurbishment, repurposing and material recovery
Why it matters
The value of a used battery is a data problem.
A pack at 80% health can run for years in stationary storage. The same pack misjudged becomes a safety risk or a recycling cost. The difference is knowing its history and condition.
Passports are becoming mandatory
From February 2027 the EU requires digital battery passports for EV and industrial batteries above 2 kWh, and US buyers increasingly ask for chain of custody and critical-mineral provenance.
Black mass is a traded commodity
Shredded cell material is priced on its lithium, nickel, cobalt and manganese content. Without assays, grading and documented custody, sellers leave value on the table.
The process
Test, predict, route, trace.
- 01
Intake and identification
Packs and modules are registered by serial number and chemistry, and a digital battery passport is opened or continued.
- 02
Testing and diagnostics
Capacity, internal resistance and impedance testing, combined with BMS history, establishes each pack's state of health.
- 03
Life prediction
Models trained on test and field data estimate remaining useful life and the safest, highest-value next use.
- 04
Routing
Each pack goes to one of three routes.
- Reuse: refurbished for the same duty
- Repurpose: second-life storage and Mobile Energy Units
- Recycle: discharged, dismantled and shredded into black mass
- 05
Black mass trade
Circunar manages assays, grading, payables-based pricing and matching with refiners, with custody documentation for every lot.
- 06
Passport closure
Every step is recorded, from first test to recovered material, for audit and ESG reporting.
Operating model
Circunar knows the battery. Partners do the physical work.
Circunar concentrates on the decisions that set a battery's value: how healthy it is, how long it will last, where it should go and at what price. Certified partners carry out the refurbishment, repurposing and material recovery.
Circunar
- Battery testing and grading
- State-of-health and remaining-life prediction
- Digital battery passport and circular traceability
- Recovery program management, logistics and compliance documentation
- Black mass trade management
Recovery partners
- Pack refurbishment and module replacement
- Second-life storage system integration
- Discharge, dismantling and shredding
- Hydrometallurgical refining and material recovery
What the client receives
- Graded inventory with remaining-life estimates
- Best-value routing for every pack
- Passport records for every serial
- Settlement for recovered value
- ESG records
More circular infrastructure
CPOCPO Standards42-point mechanical and electrical re-engineering for Circunar-managed robots.ViewIn operationreChipAutomated Board-Level RemanufacturingRetired AI data center, robotics and smart medical hardware, remanufactured at board and chip level.ViewResearch and pilotreRoboticsSecond-Life RoboticsAI-guided disassembly and refurbishment of retired robots, developed with US university labs.View
Discuss a reBattery program
Tell us about the chemistry, volumes and locations of the batteries involved.