Can you plug-in the battery while laptop is on AC only?

Most laptops have hot-plug batteries, which allows you to go to line power for a few moments so that you can swap out your nearly-dead battery for your fully-charged spare. I see Lenovos as being no exception to this.

I have a lenovo e545 that would not charge while plugged in. I looked around for every possible remedy for this and nothing worked. What did work was turning it on without that battery and then slamming the battery in. Now it is charging. HTH