Not always — it depends entirely on the seller and the refurbishment standard used, so the honest answer is "sometimes, but not guaranteed unless stated explicitly."
How refurbishment typically works: Refurbished phones go through inspection, cleaning, functional testing, and repair of any faulty components before resale. Battery health is usually one of the things checked, since it's a common wear item and a major factor in how well a used phone performs.
When batteries get replaced:
- Reputable refurbishers (including manufacturer-certified programs like Apple Certified Refurbished, Samsung Certified Re-Newed, or major retailers such as Amazon Renewed, Back Market, and carrier trade-in programs) typically replace the battery if it falls below a certain health threshold — often around 80-85% of original capacity — or automatically install a new battery as part of their quality standard.
- Some sellers replace batteries on every unit regardless of condition, as a selling point.
When they don't:
- Lower-cost or third-party refurbishers may only replace a battery if it's clearly defective (won't hold a charge, swollen, etc.), leaving a battery that still "works" but has reduced capacity.
- Grading systems ("Excellent," "Good," "Fair") sometimes reflect cosmetic condition more than internal battery health, so a phone in great physical shape could still have an aged battery.
How to know for sure:
- Check the seller's stated refurbishment policy or warranty — reputable sellers disclose battery health or replacement policy on the product page.
- Look for a battery health percentage listed (common with iPhones) or ask the seller directly.
- A warranty of 90 days to 1 year from a certified refurbisher is a good sign that battery issues would be covered even if not replaced upfront.
Because standards vary widely, always verify the specific seller's refurbishment grade and warranty terms rather than assuming a new battery is included.