mine was getting 3-days until I loaded an app that got me ONE DAY! and once I removed it and reset my Neo then all was back to normal, if you leave everything stock then it will likely last 4 days... but I have Pushbullet notifications and Neo notifications so watch is a busy little Bee all day and only at night I have it squelched of notifications and it still gets me 3 days sometimes two when I use the Gear2Cam app for pictures as that eats the battery predictably so...