Getting Data off a Dud iPhone

[leachim]

I have been given 3 iphones to try and retrieve data from

2 won't charge and 1 is dud

Is there a way to extract the files from them

Thanks

[Irons_phoenix]

I have used "dr.fone" and it worked well for iPhone. Not sure if it will work if phone is not powered on, and you need passcode.