My 9 years old daughter's iPad Air 2 no longer lasts more than 4 hours. The coconut shows %77 after only 471 cycles. I am tempted to spend $99 with Apple to get a new battery to keep her going with it for another 2-3 years. I was also contemplating if I should upgrade it to iPad 2018, but i would need to get 128 GB as her current iPad Air 2 is 64GB and she needs that space, so the 32GB iPad 2018 is out of the question. This means, the new replacement iPad would cost me at the minimum $350+tax+new case, so easy into $400 vs $100 for the battery alone. Everything on her current iPad is performing perfectly, no delays, things works just as you would expect. I am questioning if for her needs (youtube kids, some google apps for school, roblox, apple music, text messaging, FaceTime calls) spending 4x more is worth it. I get that the new iPad 2018 will be supported longer, and has pen support (which she does not care for), but also, I get a device with worse screen, thicker, same amount of RAM, same cameras, so besides faster CPU (which she does not need) I would get nothing that really make a difference worth spending 4x more.