New battery life lower than expected.

Thanks Dan, this is helpful. I would normally keep the battery topped up. 4 of those cycles are 2 calibration cycles. I have only charged it once or twice otherwise. Usually I would not fully discharge it, I was doing so in this short time frame to see if the new battery was functioning properly, as mentioned to calibrate it.

Also, I have only owned the battery for a few weeks. Even so, I have had the is 10 cycles in 174 days i.e. 20 cycles in 1 year is that honestly excessive? That would mean 200 cycles in 10 years use - a long way off Apple's suggestion that 1000 cycles of use before 80% of capacity. So you'd have to use it for 50 years before reaching 80% capacity!

I've looked into this a bit more and 10 cycles in 174 days really isn't excessive. And I shouldn't expect to see the capacity drop to 5848 in this period of time. Please can someone advise further?

@Cal Nicklin - I go a mile to get food, you go 50 miles so my cars lifespan is longer than yours.

A cycle is the depletion of your battery to a point a deep charge was required. So your actions is like running your cars tank dry. Best not to do it as one day you may need to take a hike to the gas station and the junk that's settled at the bottom get pushed into your engine which could damage it.

Remember that middle third! The more you keep it there the better! Don't over think the cycles as its just the repercussions of use. The better use the less cycles you'll burn.

Dan, I understand what you're saying. However this level of deep discharge has happened only twice in the time I have owned the battery. As you know, batteries are going to be calibrated more than twice in their life, and of course there will be situations where you run out of power.

So what I am asking is, is it reasonable to expect that a battery with just 10 cycles to have lost nearly 10% of its capacity?

Let me answer you this way; When you drop around the 1/3 charge state your system will often burn a cycle. Your battery clearly had gone through a few cycles unbeknownst by you.

Depending on the version of macOS calibration is less of an issue. The newer firmware and OS services will manage the battery better.

Until you allow your system to fully recover its batteries charge, one can't determine things accurately. Allow your system to charge a good 12 hours and then post a fresh snapshot.