First of all, just to make it clear, I've done enough research on battery technology and have never cared about charge cycle and all because the newer batteries actually can take way more than we think and the whole battery charge cycle business doesn't really work with the newer type lithium ion batteries. Having said that I've been experiencing weird issues with my iPhone 6. Granted it is almost 2 years old, but I didn't really expect the battery to behave like this within its life time. So here's the issues. The battery charges fine but while discharging I see sometimes the percentage drops a lot suddenly. An example would be literally yesterday when I left home for a meeting right in the morning the battery was charged up to 93%, on the way up to the meeting I was listening to music which brought it down to 90%. That's still a bit quick drainage given the fact that it was about 45 minutes journey but I can live with that. Now bearing in mind I was at a meeting so I didn't really use the phone at all, when it finished and I took my phone out of the pocket I noticed the battery has already drained down to mid 80s. On the way back to work I was checking emails and Facebook and Twitter, the battery drained to mid 70s. Then I put the phone in my pocket and next time when I took it out, it was down to 45% Soon another sudden drop followed and now the phone was down to 32%. By the time I got to work it was low 20s. And all of this happened within a span of 3 hours. This has been happening since last couple of months. I've tried to restore and set the phone up as new, still the same issues. I'm really worried about the sudden drops. I've got it checked by Apple Store and their diagnostics doesn't flag any issues. The genius confirmed that the battery is working at 88% capacity, which is expected for a 2 years old device I suppose & also depends on the number of charge cycles it goes through. Also, this seems to be an intermittent issue, so I can't be sure when exactly it's going to happen & can't reproduce on demand. Have you guys faced any issues as such? What did you do?