Nope..
Not using them in any way won’t help them actually, once you buy a battery it only goes downhill from there, yes using your battery once a month or so will keep it in shape, but no fully draining it, that will only hurt it.
Just make sure that if you DO take it out for removal, keep it around 50%, it does discharge over time, and keeping it full can damage it, and keeping it empty can damage it the most.
I wouldn’t give them 4 to 5 years, no way, more like 2 years! My sister’s laptop will run on its battery 15 minutes before it dies. But that was a crappy battery anyway, who knows.
Don’t worry to much though, by the time your battery life starts getting to the point where it is useless there will be far better mAh batteries out there you can upgrade to.
I don’t use my battery much since I have a 17” laptop, but when I can’t get out much time when I’m trying to do stuff like at school in a group or just in class rooms it isn’t fun when your battery is near death.
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When you are running on your battery though turn off everything you don’t need. I’ve set my laptop up to the best I can so when on battery in power save it’ll only use 5% of the core’s power, graphics card will run at lowest, and I get about 2 and a half hours on it, and when I turn bluetooth and wifi off I gain another 45 minutes, and if I turn the brightness down (from brightest) down two stops I gain 10 minutes for each two steps in brightness decrease.