A battery test was carried out on the Gadget show to find which battery offered the best VFM. The longest lasting battery was the Energizer which lived up to its claim of lasting twice the length of time of other batteries (Duracell included), but the downside was they cost over twicw the price!!! The best VFM batteries were Morrisons own brand believe it or not!!!! (worked out on a pence per minute scale)