These days you can buy most items online. But if you have a doubt or need some clarification, you get only a canned reply from all the majors - Amazon, FlipKart and so on.
During the corona times I needed an automatic water dispenser so that the taps are not recontaminated by repeated handling.
Alchemy Media Marketing store listed one such product. I wanted to check if it is mains operated - a pain to connect your tap to the AC mains and poses severe risk of shock and death.
I called the phone number listed in the site and someone answered. He was knowledgeable about the products they are selling.
He told me the automatic water dispenser uses Li-ion battery and doesn’t require any AC mains connection. He assured me that the battery will last for 6 months per charge.
I forked out the money and it was one of the best buys for Corona times. It saved tons of water too.