How hot can a lithium ion battery safely get while charging? I've found some references to 113F, but I know a lot of batteries used in cell phones get a lot hotter than 113F. I measured 140F on my Galaxy S4 while it was charging up from a fully discharged battery. On the other hand, Samsung is currently exploding batteries with their Note 7, so cell phone manufactures may not be the best reference.
Is 113F the max ambient temperature for charging lithium ion batteries? In that case, what's the recommended max temperature for a battery pack itself?