Need help with accumulator measuring device

Hello
I am working on my exam project where I have to build a device that can measure the remaining power (Ah) in an accumulator.
I’ve spend some hours searching for some PCB designs or diagrams that can help me develop my device, but I can’t seem to find anything.

I was wondering if you people could give me some guidelines, or even better, some examples on some measuring devices.

Thanks for your time; I am looking forward to your helpful replies!

-Crlsn

Have you looked at something like the DS2438?

Mike.

Hi Pommie, thank you for your quick answer!

I've had a look at the device, but it seems a bit too advanced for me, and its quite pricey too (£32.23 + shipping).

But I must admit that I really like the features.

Can you recommend another solution?

Thanks!