Say: presistent internet connection with no extra battery eaters gives you avg X hrs on GPRS/EDGE, Y hrs on HSDPA and Z hrs on wifi.
Having SIP registration decreases by a%
Having XMPP online decreases by b%
Having Nokia Messaging in push mode decreases by c%
Having ICQ online decreases by d%
Say: presistent internet connection with no extra battery eaters gives you avg X hrs on GPRS/EDGE, Y hrs on HSDPA and Z hrs on wifi.
Having SIP registration decreases by a%
Having XMPP online decreases by b%
Having Nokia Messaging in push mode decreases by c%
Having ICQ online decreases by d%
etc etc