I always have great difficulty getting this product over the counter at the local supermarket. So this time I thought I'd try to find it on line. I've bought a couple of things through Amazon and the service has usually been good.
The biggest issue, was not knowing if the battery was the right size to fit the Ikea alarm clock. And there was no sure way of finding out. I went with the Sony product because the labelling and product description was really clear, but it is not the cheapest option. However, as the cost of P+P was almost twice the price of the article I cancelled the order and instead re-ordered 2 batteries for roughly the same delivery cost. The batteries turned up within a day and fit great. Now I get to work on time, I'm happy and my Boss is happy.