very cool

fireeeee

depending on the age of the laptops as well, it may be possible for you to eject the battery from the bottom shell without opening the computer up, and slot in a new one from eBay or Amazon to further prolong their lifespans and save more money in the long term.

if you need any help or have any questions for either direction I'd love to help you out if I am able to. even if you only try them on the older laptop you didn't necessarily want to dig out.