Officially the voltage in India is 220-240 V / 50 Hz. You can check here to see if this is the same as in your country. In reality, however, it is often lower. Furthermore, there are usually power cuts several times during the day, usually for an hour each. Hotels have storage batteries to cover these power cuts. Charging electrical devices like mobile phones or laptops is usually not a problem. Using other electrical appliances like a hairdryer or iron, which need more power, may not always be possible.
The plugs are of type C, E and M – see https://www.power-plugs-sockets.com/india/.
