This dataset contains basic electrical parameters and visual documentation of 360 recycled 18650 lithium-ion cells, collected as part of the CERBEA project (TED2021-131981A-I00). The database includes measurements from various manufacturers and models of 18650 format cells, comprising: Unique identification numbers for each cell Manufacturer and model information Electrical parameters: Original rated capacity (mAh) Measured actual capacity (mAh) Voltage (V) Internal resistance (mΩ) Remaining capacity percentage (%) All measurements were performed using standardized testing procedures with calibrated equipment. Each cell record includes a visual documentation entry to support the assessment of physical condition. This dataset is particularly relevant for: Battery state of health analysis Second-life applications research Machine learning model development for battery classification Circular economy studies in energy storage The data was collected between 2023-2024 as part of CERBEA's research on battery recycling and reuse. Data format: CSV file with 8 columns and 360 rows, complemented with standardized cell photographs.Funding: This work is part of the CERBEA project "Intelligent recycling of lithium batteries for the manufacture of domestic energy accumulators based on circular economy". Grant TED2021-131981A-I00 funded by MCIN/AEI/10.13039/501100011033 and by the "European Union NextGenerationEU/PRTR"."