Hi everyone, The last two times I have allowed my iPhone 5 64 GB to get low it has suddenly dropped percentage. It has gone from 25 down to 7 in a second. Also has gone from 14 directly to 7. Then while it is draining it will stay on 1 percent until it dies. Is this a normal issue? It has been on 1 percent for an hour now and it's still going. Any input would be appreciated. Thanks.