2. The newest phone is about 1500 mah (milliamp-hours). So, technically you should get 5 charges and change. Unfortunately, it doesn't work out quite that optimally. I'd expect a solid 4.
Not quite. All the latest phones have 2,200mAh+ (HTC One, Droid, Galaxy S4, Nexus 4). Even a year ago, most phones were equipped with 1700-1800mAh batteries.
FWIW, I've had a handful of 6600mAh EZOs for almost two years, always have them charged. They still perform well.
Each ONE of those units can --
- Keep my old Nexus 4 (2100mAh battery) going three-four days when starting fully charged
- Keep my Vzw Jetpack going 24h solid (which, btw, extends the battery life of any tethered phone)
- Run a fully charged 7" Galaxy Tab II for 10-12h on video playback or game-play.
- Charge a 10" Galaxy Note from empty'ish to 60% (5-6h)
- Charge a Nexus 10 from empty'ish to 60% (3-4h)
The 8600 should be 20% better.