(Opens in a new window)Kiwi says the defective battery cause "some smoke and minor flames." Although, the bystander video seems to show the little cube-shaped robot engulfed in flames. Luckily, a passerby grabbed a fire extinguisher and put the robot out. Kiwi is investigating the incident but claims it carefully monitors the state of all its batteries. Even with testing, some lithium-ion batteries will fail. Just ask Samsung -- it had to recall the Galaxy Note 7 a few years back after a series of fires caused by faulty batteries that caught fire. You can't blame Kiwi too much for trying to minimize the incident. A backlash against delivery robots led San Francisco to restrict their use recently. The robot's charred corpse has been removed from the sidewalk, but students honor its memory. They've built a small shrine with candles and flowers. They'll never forget the sacrifice that robot made to keep them fed during finals. Now read: