Review of the Luster Series Battery Bank by RavPower Product link: http://www.amazon.com/RAVPower-External-Provided-Thunderbolt-Aluminous/dp/B00GZGS4JM ... https://www.youtube.com/watch?v=hhXvc1kaS4Y

Normally around $20, I snatched this on a sales for $13 but had to wait 2 weeks to get it from China. Build quality is great on something that doesn't seems to cost most. Xiaomi did a really good job here and I cannot complain as the band is comfortable to wear 24/7 including sleeping, dish washing, showering. I believed they rated for full 1 meter water submersion for 30 minutes. This Mi Band last over a month using it with iOS with full blasted alarm and notification turned on. With it turn off I'm able to go over 45 days with no issue. The band is able to keep track of walking well, but does get confuse when you're moving your arm around doing other activities such as eating. This is the limitation of this type of technology so we cannot really fault Xiaomi too much on this. As far as sleep tracking -- I don't know how they do it so well but they can pretty much predict accurate every time when I fall asleep and when I wake up -- without me doing anything! You can also set alarm that will graduate wake you up. To stop the alarm, you can tap on the band itself. Bathroom break and incoming phone call notification also work on iOS! It's able to sync with apple Healthkit so you can import in those data and use it for other analysis. The tracker has 3 simple LED that let you know the progress of your work out by blinking at different level when you raise to look at it like a watch. For those who has a hard time getting this features to work: Put your hand flat down parallel to your body and then lift it up to look at it like looking at a watch and it will blink :). I didn't get this on android but you will get notification and few other features. You can get those notification too if you jailbreak and install an app on iOS. During my 1 month usages, 3 updates come to the band and 2 app update. I'm glad to know after over a year Xiaomi is still committed to making this device better and better. I cannot wait for version #2! Please LIKE this video if you found it useful. It will greatly help me. SUBSCRIBE to see future review videos :). Follow me on social networks Facebook: https://www.facebook.com/Jtechreview Twitter: https://twitter.com/ninjaducksauce #jtr ... https://www.youtube.com/watch?v=Sf6gpVm11CE