JIEBU iPhone Battery Case 4000mAh, iPhone Case Charger for iPhone 6s Plus / 6 Plus / 7 Plus / 8 Plus, iPhone Case Battery Portable Protective Charging Case 5.5 inch, Black

This is my first experience with a battery charger case. I followed the instructions by fully charging the case and then running it. It gives me full phone charges once my phone battery gets down to 20%. The third charge is roughly 40-50% battery.The charger case does add considerable weight to my phone (as expected). Slide in and slide out design is good and lightning plug helps me to get charging easy.All in all, the case performs as expected. I would strongly advise anyone purchasing a case like this. The drawback is that your previous phone case seems useless.

My iphone7+ battery is not lasting long enough. So I bought this battery case, 4000mAh, that's a lot. Now, I can leave for work in the morning and go to a party and come home 16 hours later, my phone is still going. I plug it in before going to bed, the next morning, I am good for another whole day! Also shipping is great. I got the case the next day. I really like it.

I bought this item on May 14th, on June 13th I requested a replacement due to it stopped charging my phone. Yesterday 9/16/2019 the battery case stopped charging my phone again. Do your own math and arrive to your own conclusion. A waste of your money and time :-(

Nice charger, but keeps turning off and right back on again when charging phone. The annoying tones sound many times every charge cycle.

Does not hold a charge one month after purchase. Started off as described but very disappointed in overall life of product. Is there a warranty on this product? Amazon replaced with a second case after dealer did not respond - second has failed as well. Would not recommend this brand at all.

This is the second one we got, first one was a gift, and I love it so much. We are going on a camping trip so I just bought a second one, so that I can last two days without the need to charge my phone. 4000 mAh capacity is huge, the case fits perfect with plus size iphone, very well built, smooth back, very comfortable. I would suggest anyone to have two of these!

The battery case is thinner and lighter than what I thought. It can be charged multiple times a day, enough for my whole day use. Charging without plug cord, this protective charger case brought convenient for me.

It is a great case, lightweight, not bulky, but it never charged my dying cell phone.