I don't feel that I need to keep the settings current, because for me it's really easy to program the pump. I'm more concerned with keeping the pump in working condition. I can't imagine why a working battery is necessary until I need to use the pump, but I'm just curious if anything degrades if you don't keep a battery in it. I can't remember if a new pump is sent to you with a battery it in. I know that Medtronic has a red plastic insert where the reservoir goes.
I have to admit that if I have to change the battery once a month, there is no way in the world that I will do this. I'd be good for a month or two, then....
I'll probably give Medtronic a call, but I bet they'll recommend keeping an updated battery in it.
Everyone talks about Medtronic's aggressive marketing. I've actually been surprised that when my pump went out of warranty that I never got a call from anyone at Medtronic.