IMac should have a battery

Question

iMac should have a little battery inside to prevent damages from power interruptions.

Answer 1

LaSalamandra wrote:
I think that a little economic battery should save the life of iMac hard disk.
There is much more to it than just adding a battery.
To begin with, it has to be able to supply enough power to run the iMac. Depending in the model that could be anywhere from about 50 to 300 watts. It also has to be large enough to supply that power long enough for the iMac to finish whatever it is doing, write any changes that requires back to the hard disk, close all files, & do an orderly shutdown.
But since an iMac isn't designed to run on the low voltage batteries supply like a laptop is, you either have to include a few dozen of them wired in series to get the required voltage or include a voltage converter. Obviously, there is no room for dozens of batteries in any iMac so you have to include a voltage converter, one large enough to supply the 50 to 300 watts the iMac needs to run.
You also have to include a built-in charger & all the safety mechanisms required to keep the battery from exploding while it is being charged. You can't use sealed lead-acid batteries like in conventional UPS's because they are way too heavy & bulky to supply the needed power in a small enough package, so you have to use expensive lithium chemistry batteries. That means you have to include a temperature & charging current monitoring system & use battery packs with the extra contacts that requires, just like with laptop batteries.
Do you begin to see why everybody is telling you this isn't practical? The battery & associated circuitry would be neither little nor cheap. It would increase the cost, bulk, & weight of an iMac to levels most users would find unacceptable; particularly since compact, inexpensive UPS's are readily available & provide far longer run times than anything that could be built into an iMac.