talk time = power of battery / (power required to RF transmitter + phone's function)
RF transmitter power eka tower eke sita dura / area, weather anuwa wenas wenawa.
high RF power = low talk time
oya kiyana talk time eka enne tower eke 300m wage athulatha innawa nam.
nokia phones walath oya kiyana talk time eka enne na..
14h talk time thiyena phone eke battery capacity eka kiyade ?