Battery max temp. 45°C and CPU max temp. 75°C

My phone is heating even with the normal usage but while playing games like asphalt 8 or modern combat 5 it is heating upto 75°C

Is it normal or I have got a defective piece again.

My max. Battery temp. Is 45°C
Max. CPU temp. Is 75°C

The earlier device I got was also heating so I replaced it and now this one is also heating the same...

Is it normal with this device or I have got a defective piece...

Plzzzzz help it's urgent...

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