I bought a replacement battery that was not OEM off eBay. After about 4-6 months of use, the thing nearly blew up on me. The battery got so hot it could’ve started a fire. Seriously, spend the extra money, its not worth the risk.
If you’re buying a replacement make sure it meets the safety standards and it is approved for use. I’m going to be buying only OEM batteries/chargers from now on.
Hey, sorry for necroposting, but how is your battery doing? If it’s still cranking and not-exploded, would you mind sharing the brand? I’m considering replacing the battery in a T420 and trying to decide between shelling out for OEM or rolling the dice on third-party.