Ordered a replacement laptop battery on eBay and got two duds in a row. Could it be a problem with my laptop?

I've gotten replacement laptop batteries on eBay several times before and never had a dud, let alone two in a row.

Laptop is a Dell [Latitude 7285](https://www.notebookcheck.net/Dell-Latitude-7285-i5-7Y57-256-GB-3K-Convertible-Review.247468.0.html). Primary battery looks [like this](https://images-na.ssl-images-amazon.com/images/I/61eAgSq9YxL._AC_SX522_.jpg) (there's a second battery in the detachable keyboard).

* Original battery works, but lasts ~30min from full

* First replacement was picked up by the BIOS, but will not charge (confirmed by HWInfo64)

* Second replacement is not detected at all

I've tried reseating the connector, cleaning the contact pads, leaving it to charge overnight–nothing works. I did reinstall the original to make sure it still works as well as it did previously.

The replacements are new-old-stock OEM parts from 2017, so I wonder if they're just unresponsive from having sat in a warehouse for 5 years.

Anything I should try before asking the seller for another replacement or my money back?