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

Solution 1:

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.

Solution 2:

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

Solution 3:

Personally I wouldn't risk it. If, as you say, the power cord is short there's a good chance it'll come out during the operation anyway.

Laptop batteries are designed to be left in whilst the unit is on mains power anyway so you're not really gaining anything by removing the battery unless you're not going to be using the battery for an extended period.