Since the Action AA batteries last 4 times as long as Bonus AA ones, even though they cost four times as much for convenience in only having to change them once compared to 4 times for the same length of time, this is a good reason to buy them. This is especially the case if the batteries are being used in a remote place such as by a geologist with a GPS out in the bush then he/she doesn't have to worry about them running down so much.
