I charged my phone up and left it unplugged with wifi on through the night last night. Woke up and 100% battery. In the office today (no internet) where we have very bad reception that comes in and goes out and within 5 hours or so lost over 10% (no usage, in my jacket pocket whole time). So, is it right that if the phone is constantly searching and unsearching to cell signal, it will drain quickly. Thanks.