Aha! He says, having just read the manual and realised that although his last camera defaulted to having the power-saving turned on, the IXUS 700 seems to have been delivered helpfully configured so that if — say — you are stupid enough to leave it on in your bag after fully charging it on Thursday night, it will quite happily stay on all night and all the next day so that it has gone flat by the time you want to use it on the .

The camera is now configured so it turns itself off, thus hopefully avoiding future tantrums by its owner.