i have just purchased a uk vizion headlamp turned the headlight on 30 lumens of light brilliant i minute later nothing the light packs up .on inspection i open the headlamp the batteries are roasting hot .what is wrong with this product .i have now had to send it back to shop where i purchased it for a replacment ,is this a common occurance of this product ,i know they claim the workings are the same as a petzel which i know are very reliable as i have owned several for many years .perhaps i should purchase a zebra light or have i been unlucky with the uk vizion.take it easy pukka paul.