Batteries in airplanes in India

Tomorrow we're going to be flying from Khajuraho to Varanasi on Jet Airways. We were told that when flying within India, extra batteries must be in checked baggage. A device may have its batteries but nothing loose. Very strange. It's not a big deal, but I have to remember to take the extra batteries out of my camera case before leaving my suitcase out for porter pickup at hotel tomorrow. Will have to remember again when we fly back to Delhi on Sunday. Always something different to keep us "alert."