well i checked the batteries and i got one duddy. tested shots with the camera using each battery on its own. All other batteries got 950 - 1600 shots over a hrs use each. where s the dud one got 40 shots and packed in. the batteries are meant to have a anti surge protector in them it says. I usally only recharge when they a very very low and always use them in a battery grip, so if they did blow which i hope not it might help minimise damage but could thay short circit the electrics in the camera.
7 day shop seems very good with there pices. found these on there site
7dayshop.com - Online Store
Thanks for the advice people. Always handy to know others opinions