inputs.text: great customer service updated - update using unit year intermittently routinely sits car wicked cold goes extended periods charge without use gets heavy use far stellar performer need backup power badly sometimes not times want available unit prior review received present read everything could find external battery packs decided give one try received sadly didnt work iphone 3gs wouldnt \\beep\\ like plugged even though showed charging charged 5hour phone turned emailed support address description problem asked simple tests cable check etc nothing changed sent rma entire proses took 2 hours 9 min via email includes checking facebook etc sent unit back via priority mail got 2 days 2 days later received new one topped charge overnight tested next day ran phone 5 plugged powerpack proceeded put 3 hours heavy internet phone 3g use unplugged phone use end time phone charged 70 left plugged phone within hour didnt precisely time phone fully charged far great product great customer service problem