In a small mixing bowl, mix together all ingredients for the batter (Rice flour, All purpose flour or maida, salt, and turmeric) with approximately half a cup of water. Pour in the water a little at a time and mix it all in using a wire whisk, making sure there are no lumps.
Pour oil in a deep frying pan and heat over medium heat on stove top. There should be enough oil to submerge the banana fritters and there should be enough space(in your pan) for the oil to rise when you add the banana pieces.
Typically, the whole banana is slit length wise, batter dipped and fried. To make it easy to handle, cut the bananas into half, horizontally. Now, slice each half into three pieces lengthwise. This would give you 6 pieces from each of the banana. You can do this step while you are waiting for the oil to heat up.
When the oil is sufficiently hot (see Recipe Notes), dip the banana slice in the batter, and deep fry. You can add as many pieces as your deep frying pan will hold Make sure that you can flip the pieces comfortably.
When one side is a golden brown color (takes about 2-3 minutes), gently flip over to the other side using a slotted spoon and fry the second side too. Do this step for each of the piece being deep fried.
In about another 2-3 minutes, when the second side has turned golden brown, remove the pieces using the slotted spoon, drain the excess oil and transfer to a plate. You can line the plate with a paper towel to drain the oil further.
Repeat with rest of the pieces.