I own two phoenards. One is equipped with GSM antenna and GPS receiver, the other one not.
Has this an impact of discharging the accu while in standby / off mode?
I observed, that the fully equipped one is discharging faster than the basic one, while it’s only laying around switched off.
Also charging the fully equipped one lasts forever, which means, the flash on the battery screen never stops blinking like on the basic one, when it’s fully loaded.