My phone battery status
I just bought a iphone 6s from Digi store with my postpaid contract. But inside the unopened box is a new but no battery iphone. Then the seller help me to charge about 10mins to let me check about the phone status. Isn't that the li-on battery cannot be stored long under the no battery status? Is there any problem to my new phone and should I go to the store to change a new phone?
I also check the max battery capacity using the method online and it show that the max capacity of battery of my iphone is 1800. But accroding to the official capacity of iphone 6s is only 1715mh! Is that any problem my phone?!
Please help to solve my question, thanks!
iPhone 6s, iOS 9.3.2