Let's look at today's Dell page. I see 300 cycles or 18 months. You are well over that so I'm not confused at all here. You should get a new battery. No, it ages just as fast on the shelf or in use. About the only thing that slows the aging is to charge it up then place it in a ziplock bag (moisture control) then in the refrigerator for those years. Sometimes helps but it's a chemical thing. Think about it.
As to mAH, the more the better if you want more minutes but the same degradation happens over time and cycles. It seems to annoy a lot of people that these only last a few years in or out of use.
I am a bit confused about batteries in Laptops and wanted to see if anyone had an idea.
My Laptop is a Acer Asipre 3614. The battery is pathetic, it lasts me about 40 mins - 1 hour on Max battery life setting which is pretty sad all by itself. My father had this laptop tucked away in a carboard for nearly 2 years and I think it has damaged the battery.
I would like to know how long should I be getting out of the battery and would a 8000mAh be any better than the 4000mAh that is currently installed and how long should I get out of that? Thanks any assistance greatly appreciated.