(January 5, 2018, 2:12 PM EST) -- OKLAHOMA CITY — Two men who contend that they were injured when a lithium battery exploded while they were working on a hydraulic fracturing rig on Dec. 29 filed a notice of appeal in the 10th Circuit U.S. Court of Appeals (Jacob McGehee, et al. v. Southwest Electronic Energy Corporation, et al., and Southwest Electronic Energy Corporation v. Engineered Power LP, et al., No. 15-145, W.D. Okla.)....