Amazing battery lifetime... I got my new iMac Pro in the last week of December, roughly six weeks ago. It came with a wireless keyboard and mouse that incorporate built-in rechargeable batteries, much like a smartphone has. My old mouse used ordinary AA batteries, which I typically had to change every 3 weeks or so. My old keyboard plugged into USB and had no batteries at all.
So one of my first questions about these new-fangled peripherals was: just how long would these batteries last on a charge?
Well, I now have the answer for one of them, the mouse. I recharged it last night for the first time since I received the system, when it reported being at 5% of charge. My keyboard is still at 70% of charge, after six weeks of frequent use.
For approximately the 37 billionth time, I am just in awe of the degree of advancement in a technology, within my own lifetime. Rechargeable batteries were basically non-existent when I was a kid. The standard was old-fashioned zinc-acid batteries, which are actually quite difficult to buy today – alkaline batteries have basically taken over the disposable battery scene, with capacities several times that of a zinc-acid battery.
The most significant advances aren't in the batteries, though – they're in the incredibly low power consumption of even fairly sophisticated circuits like a Bluetooth optical mouse. That's truly mind-boggling. The simple, inexpensive optical mouse on my desk has functionality that was either impossible (Bluetooth) or really difficult (the optical movement sensing). The latter alone would have taken a roomful of circuitry in the '50s, dominated by power-hungry vacuum tubes. A wild guess at the power consumption would be 5 to 10 thousand watts. My modern mouse can't consume more than a few thousandths of a watt at most. More likely it's an order of magnitude less than that.
And now we have an electric car headed to the asteroid belt! :)