Reader J. E. writes:
"I just purchased the S1 iS. Great camera, however, I am thinking I may have a defective one. The batteries are dying extremely quickly. I am talking under 10 minutes, and that is just playing around with the menus, taking a few still shots, and less than 60 seconds of video.
"I know you have done some experimenting with the movie mode. Do you know approximately how long a new set of 4 alkali batteries should last when the camera is shooting in movie mode?
"Thank you so much for your informative site on the S1 iS."
The key to the problem is that you are using alkaline batteries. The ones included in the camera's box are just there to get you started, and because Canon is too cheap to include proper batteries.
You MUST use rechargeable NiMH batteries. (Even NiCad batteries are too weak.) One set of four will last you for one or two hundred photographs. Currently, the most powerful are rated at 2300mAhr. Get two sets (eight batteries) and a smart recharger (one that trickle charges the batteries once fully charged.)
J. E. replies:
"That is very helpful information. Have you ever used batteries in movie mode? Approximately how long should 4 NiMH batteries last? 20 minutes? 10 minutes?"
I ran movie mode on freshly-charged batteries, and was able to record for 51 minutes (until the 1GB card was full), and the batteries were still good.
J. E. replies:
"I tried the batteries you recommended. Much better. I am now getting the anticipated performance."
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