I have the previous gen 12.9" iPad Pro and my keyboard has just started giving me the not recognized messages and occasionally not working. It hasn't died compl

I have the previous gen 12.9" iPad Pro and my keyboard has just started giving me the not recognized messages and occasionally not working. It hasn't died completely yet but I'm giving it to my son and he'll mostly just use the pencil doing art stuff so it's not that big a deal personally. Still, it's sad to see so much Apple tech being life-limited due to aging batteries or what not.