The games are adjusted so they won’t kill your battery. An hour of slots on your phone consumes about as much charge as an hour of streaming HD video—maybe 15%. I’ve played for long stretches and the phone stayed cool, no scary battery drain. The graphics adjust to your connection strength: if you’re on a weak signal, the quality reduces a bit to keep you playing without buffering, and that also preserves data. Iris Casino’s adaptive streaming is smart about it; I’ve taken it on a road trip and never received an excessive data warning. Background processes are held minimal, so your data plan won’t take a hit either.