A:AnswerI have had great success with as many as 2-3 additional charges a day. One must push and hold the back button for a few more seconds. It sounds as though you might not be pushing long enough and merely getting the lights that tell you how much charge remains in the backup.
A:AnswerIf you changre the the phone through the case then just let the case keep charging even though your phone is at 100% when you push the button on the back all the lights should light up to indicate a full case charge
A:AnswerNo, it's not that good. I have had a problem with looking for phone cases which are waterproof, and can charge your phone. After switching to a normal case and a glass screen protector I have had much better results and have saved some $
A:AnswerYes it does due to the raised edges and side impact protection. I would not recommend a lifeproof for this feature though. I'm using a regular case and a glass screen protector and it works great.
A:AnswerI researched this case and have one for the IPhone 6S. I couldn't find it offered for the 6S Plus which I also have. I purchased the standard FRE case since the 6S Plus has a longer battery life than the 6S at least from my experience. I also thought the battery case if offered would make IPhone 6S Plus bulkier than necessary. Call Lifeproof and see if they even plan to offer it if you really need the extra battery life. Other vendors do make cases with this option such as Mophie.