How long does the battery on the GateKeeper Halberd last? Abhinav Jain January 26, 2019 20:37 Updated Follow Depending on usage, the battery on the GateKeeper Halberd can last between 4-6 months. Related articles Why is my GateKeeper Halberd blinking red? How can I check the battery level on the Gatekeeper Halberd? How should I carry my GateKeeper Halberd? Does the Gatekeeper Halberd token come with a USB dongle? Comments 0 comments Please sign in to leave a comment.