They have worked for me fine with no probs.if ur talking about these ones http://cgi.ebay.co.uk/10-x-DURACELL-PROCELL-9V-PP3-ALKALINE-BATTERIES_W0QQitemZ290270540816QQcmdZViewItemQQptZUK_ConsumerElectronics_Batteries_SM?hash=item290270540816&_trksid=p3286.c0.m14&_trkparms=72:1300|66:4|65:12|39:1|240:1318
i brought them before and the lasted 1/2 games, right rip off.
the ones i can get last ages
the brand is GP