The phrase "older batteries" refers to batteries that have been used for a longer time and are not as new or fresh as newer batteries.
Sentences with «older batteries»
We've been hearing feedback from our customers about the way we handle performance for iPhones with older batteries and how we have communicated that process. (businessinsider.com)
But they claimed that they do optimize the health of old batteries by using software assistance to keep a close check on the battery performance. (onphones.com)
Remove old batteries and and if possible, install new ones. (thespruce.com)