Phone battery use searching for a signal I just got hi speed internet and turned on wi-if calling on my iPhone 6 since I have poor signal at home. Also just installed a signal extender(booster)from Verizon, which increased my signal to full strength. 
Since I don't need both I was going to send back the $160. Extender to Verizon, but would my phone then be searching for a better signal even though its on wifi calling and using more battery life?
It might. This questions shows several factors there are to battery loss, including the cell reception, but that Wifi can help reduce that. I would recommend following his 5 day test procedure before returning the signal extender.