Since "hot" in this context usually refers to or shortcut buttons for a digital satellite receiver, Micromax MM-2070 Mini HD Remote : Essential Hotkeys & Features The Micromax MM-2070 Mini HD
Low-quality or old batteries can sometimes leak or develop internal shorts themselves, making them feel hot to the touch. Immediate Troubleshooting Steps
Micromax MM-2070 Mini HD remote is getting hot, it is likely due to an internal short circuit stuck button causing continuous power draw
Press and hold SET and POWER simultaneously until the indicator light stays on.
A stuck button (e.g., volume down or channel up pressed inside the casing) forces the IR LED to emit continuously. That LED draws power and will get hot after a few minutes.