As someone who seems to be constantly charging batteries for Canon PowerShots, this may be another option. These NiMH AA batteries seem to be used like normal batteries, but, can be recharged or quickly boosted by plugging into a USB port of a home PC or laptop, if travelling.
At 1300mAh, these AA cells are less than half the capacity of currently available modern NiMH cells, rated at 2700mAh, so I wouldn’t waste my money on them. You’ll be forever charging them.