BOCA RATON, Fla. (CBS12) – The lithium battery of an e-bike caused a house fire on Monday night. According to Palm Beach County Fire Rescue (PBCFR), at around 9:45 p.m. units responded to a structure fire near Valencia Drive in the Boca Grove Community. PBCFR says the 911 caller was a utility driver who stated the back patio was on fire.