Battery health
Grading & Condition
Battery health is the percentage of original maximum charge capacity remaining in a used device, measured as a function of charge cycles completed and electrochemical degradation over time.
Battery health has become an explicit and increasingly standardised pricing variable in the refurbished market. Back Market and Amazon Renewed both require disclosure of battery health for listed devices, and sub-80% battery health typically carries a discount of 5 to 15% versus a same-grade device with healthy battery. For buyback operators, battery health assessment is a mandatory step in intake diagnostics, as it affects both grade assignment and downstream resale price estimation.