Aside from using the flashlight and compass apps that first night he's barely powered it on for any reason, so there should be adequate battery life. Thanks! The rest of my search request remains as is — K and his posse will continue heading for the airfield.

Oh, reposting for one more addition: they're going to try using Chloe's bracelet on everything K's found during the rescue mission (particularly that silver medal), will the bracelet react to anything?