I can't figure out how to insert the batteries. カスタマーセンター October 25, 2017 08:21 Updated Follow Please open the cover on the top of the NinjaLock by pulling the catch. Insert the batteries in the correct position. Related articles How long is the battery life? What kind of batteries should I use? Which OS does the NinjaLock support? Would it be possible to operate at times of black outs? The application shows that the NinjaLock is not found, and I can not register my new NinjaLock. Comments 0 comments Please sign in to leave a comment.