PC: Earliest Electricity/Telephones?

This a random thought bunny that popped into my head earlier after I sat without power for 6 hours, it came on for less time than it took to boil a kettle and the kicked off for another 3 hour stretch.

What is the EARLIEST (I assume it won't be before thr 1750s) that electricity/telephones could be discovered/invented? From what I recall from high school physics, Volta, Ben Franklin and some other guy (think it was the one they named ampères after?) were doing experiments with electricity.

As to telephones, well, I'll profess ignorance beyond knowing Alexander Graham Bell invented the telephone and never called his wife or mom because both were deaf (apparently). But what would be the earliest a similar communication device could be invented?

And more importantly, how would this change the world?
 
Probably 800s AD, when drawn bronze and copper wire became available, Geber discovered suitable battery acid, and there was still an Eastern Roman Empire to fund and use a telegraph network.
 
As soon as metallurgy is developed enough for drawing wire to a length to be useful at a non bankrupting price ,for anode and cathode metals and an electrolyte solution to be made in large quantities, and an impervious glass or ceramic housing to contain that battery.

So the Greeks or Chinese for a telegraph.
 
Electricity was long known, with the first experiments involving it happening in the 6th century BC. The main issue was that electricity was not particularly useful, because no one had any idea how continually provide an electrical current to a circuit. Development of the Voltaic pile in 1799 helped things along considerably, but it wasn't until Michael Faraday developed the dynamo in the 1830s that electricity was good for anything besides parlor tricks and pure research.
 
I have seen claims that it’s possible to create a working telegraph system with Stone Age technology.

This is interesting.

Probably 800s AD, when drawn bronze and copper wire became available, Geber discovered suitable battery acid, and there was still an Eastern Roman Empire to fund and use a telegraph network.

Would they though? I've seen a lot of mentions that the Roman Empire (not sure about the Byzantine continuator) DIDN'T support a few tech gizmos (especially with regards to a Roman industrial revolution) that would've improved life.

Electricity was long known, with the first experiments involving it happening in the 6th century BC. The main issue was that electricity was not particularly useful, because no one had any idea how continually provide an electrical current to a circuit. Development of the Voltaic pile in 1799 helped things along considerably, but it wasn't until Michael Faraday developed the dynamo in the 1830s that electricity was good for anything besides parlor tricks and pure research.

So, would there be anyway to up this TL? Either the voltaic pile is thought up earlier, or someone gets a headstart on Faraday (perhaps even Faraday himself - if that's possible)?
 
Many sources say that this guy invented the telephone before Alexander Graham Bell did (and Elisha Gray, too):
https://en.m.wikipedia.org/wiki/Antonio_Meucci

To me that story of his court case against Bell etc sounds a bit like whoever has the best lawyers is right, regardless of what the actual truth. And if we are to believe Meucci, that moves the invention possibly decades ahead to the 1830s. Pity that there was no interest in developing it more that by the time Bell comes up with the telephone, the Italians turn around and say: "we know this. We've had it for the last thirty years"
 
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