: Ensure it has at least a 50% charge to prevent it from turning off mid-update.
To help troubleshoot your specific issue, please let me know: Which are you using?
As of April 2026, the world of Sphero robotics is more advanced than ever with the release of the Sphero BOLT+
When updating multiple Bolt+ units, you can place them in a circle facing each other. The primary robot downloads the firmware from the phone, then beams it via IR to the adjacent robots. This is a massive time-saver, but ensure there are no direct light sources (sunlight) interfering with the IR beams.