Help for hooking radio speaker to 3.5mm headphone jack

Hello


I have an old Nokia E72 phone with standard 3.5mm headphone/line-out/etc jack and I've like to hook up a spare external speaker I found from an old 220v FM clock-radio which got it's clock messed up so I put it away.
I already detached the speaker from the radio, I thought it would work but I guess it needs external power,

Specs:
F - F
0.5 W 8ohm
2

and it has a yellow and blue wire.

I do have a local special electronics shop not far that has all kinds of DIY stuff that big markets never have, like resistors, so I rather do something DIY with a battery

But I have zero electronics knowledge, I have no idea what's the voltages, ohms, ampers needed, but I do have a small multimeter at home if needed so it should be easier.

I do have 220-240v line at the location, but there's no any PCs so I would ignore the whole USB speaker thing that I just came across, I can also find an old phone charger to convert to a more managable voltage out of that i could crate a DIY setup.

 

Is combining left and right channels necessary? Because I don't need both.

Do you have any idea on how much would this cost me approximately, for the parts I would need, to see if it's worth it.

That said, I don't really know anything about wiring either, and what amplifiers are, so I would need a step by step visual tutorial unfortunately.

 

Oh yeah ofcourse, but I don't think the radio show I'm listening to has and special left-right channel stuff, unless they're playing an external clip but probably it goes through the systems to make it stereo if it's not, i don't know really, I might try it on the PC a few times to see if there's some missing stuff.