Silver / zinc batteries can work an acetic acid, easily distillable from vinegar. With some luck, alkaline batteries are also doable (IDK if Egypt had any sources of manganese). With some effort, sulfuric acid can be produced, allowing lead-based batteries. Two of the three are rechargeable, but having the acid and zinc as consumables is also OK.
Copper wire is perfectly doable; copper was produced in mass quantities, drawing it through a ceramic die should do the trick. Producing cheaper brass (copper + zinc) is also not a problem.
For magnets, we'll need some iron. It can either be produced from ore, or taken (as an alloy with nickel) from meteorites that Egyptians also found. We don't need much.
Insulation can be made from canvas and oil (like oil painting, but without the picture). Wood can be the non-conducting construction material instead of plastic.
With this, we can easily build telegraph and telephone. With some high-voltage coils, we can build a radio transmitter capable of Morse code transmission. This all would look like pure magic and would have immense military value.
Note that it would take nothing extraordinary technologically: most things are readily available, no need to build machines to build machines, etc. It would only take a much larger body of knowledge about the world.
Imagine steam powered Roman legions... It could have happened.
this doesn't address RAM/store limitations though.
Especially, whether you can pack in a human's worth of knowledge into a 2005 HDD (of course you can if you have huge numbers of them, but seems against the spirit of the idea).
And, the estimates of human neural complexity. It's possible that the human brain isn't very efficient at intelligence alone - there's many survival functions and the historical path evolution happened to take. (as harder evidence, I also read of a guy with almost no brain, just a few millimeters coating the skull, who had normal college IQ...)
But I was really adding my own tangent, a thought I had long ago: assuming intelligence can be simulated by an algorithm, it can be done now, because of turing machine equivalence (provided we have sufficient memory). If it used too much memory, it seems likely we could still run a cut-down version, or some aspect of it. [BTW: Arguably, if a mathematical model of consciousness exists, with variations for personality, knowledge, present state of mind etc, all of them are virtually conscious and feeling at all times - just frozen in stasis at the moment].
Historically, one barrier to new algorithms is that practical people just don't entertain algorithms that are computationally infeasibile on present hardware. But when hardware is fast enough, they are more willing to. Perhaps the ability to experiment and iterate quickly is also helpful.
(Yes, that's why atari chess did not show the board while thinking, and why if there was a bug you'd get a 1D horizontal image all over the screen)