The headline has been changed to reflect this, along with the first, fourth and fifth paragraphs. The story has been corrected on the wire and now reads as follows:
Lenovo to replace defective ThinkPad batteries
Lenovo is offering to replace certain batteries sold with its ThinkPad line of laptops, warning users that they may be permanently damaged due to errors.
The company is offering free replacements for batteries that do not recharge or suffer from "irreparable damage," according to Lenovo's .
Users need to run a diagnostics tool to see if batteries show any of those symptoms. The tool can be downloaded from Lenovo's support site. If it indicates the battery either is damaged, shows sudden drops in the fuel gauge or fails to recharge, then the battery may need to be replaced.