Amazon カスタマー 5 My Iphone X was always running out of battery power during the day, and I only got 5-6 hours of charge from full-charge state (82% health score).I decided to buy this case instead of installing a new battery and am very, very, happy with the decision.I now can use my phone from morning to night (easily get 12+ hours usage) before needing to charge.The case uses an Apple lightning cable to recharge, and the whole phone is protected by the smooth silicon rubber case.However, you need to be careful when installing and removing the phone from the case, as the lighting port insert seems quite delicate and can be damaged by wrongful insertion.Charging my phone AND the case takes a good 4+ hours. But it's worth it to have battery throughout the day without needing to find a power plug.Case is also a bit heavy, but the price and usefulness of this product is excellent.(I haven't dropped my phone with battery case yet, so I don't know how the case holds up after being dropped on hard surfaces from height. I don't expect it to be as resilient as a normal non-battery case though).