It would appear that this retailer has these tea lights shipped from different companies. Some are slightly deeper than others and hold the single CR2032 batteries and don't need a screw driver to open. Others less deep and take 3 small batteries. So, I guess that is why people seem to be describing and rating the tea lights differently. I received my order after 15 days and they were shipped from Singapore. They are the smaller ones and take 3 of those tiny little batteries and they open without the need of a screw driver. I initially thought some of them didn't work but it was just because the batteries had been dislodged a bit during shipping. They all work perfectly. Don't know how long they will last but I would say for £3 they are of comparable value to wax tea lights and safer especially if you have children or pets around the house.