ROM with minimum functionality

[iAnoop]

I still have Galaxy SII and completely working. I am looking to make it as GPS system.
I am looking a ROM with literately no functionality except the APK I will install.

A identical ROM would allow me use Google Maps navigation and does nothing more.
Why? So that I can save battery from Google services and other apps eating battery in background.

Appreciate the help,
Thanks.

 

[Abels2]

Chameleon ROM (4.1.2) or 2.3 based roms

 

[iAnoop]

Thanks, I went for slimbean 4.4.4 ROM. Seems quite fast.

 

[frozencode7]

use the default samsung rom. it will give good battery life without heating

 

[Maltrash1]

My SGS II is working almost 2 WEEKS (!) after battery charging. Of course most of the time on standby and with high signal level and wifi/3g offline.
I use it as third phone - when selling on olx or eBay.

I love S2!! It is small, handy and battery lives like on ancient times Nokia 6310

[Edit]
One important note:
I use fully functional AICP (7.1.2) and Greenify