Thought I'd share my usage this morning as I am so impressed with how well it's lasted. Had a long, long day at work yesterday, admittedly my phone was only used for 7 hours, but the amazing stand by time, even with 4G on all day, receiving push emails, notifications from whatsapp Instagram and Facebook. So I am impressed. I even went out for the evening without having to worry about charging my device! Very happy in comparison to my previous iPhone 5