CAMERA MESSAGE SD790 IS

Mostt batteries have an issue of SHELF LIFE and so if the battery that was given to you was on SHELF for a long time then it can develop BACK EMF and so will not charge to the limit designed. So check the date on the pack and if this is more than 6 months ago , it is better to claim for a refund or replacement. If your camera did not have any other issue this is the only possibility.
The first charge also must be done for 8-15 hours.

You need to fully charge your battery pack. When you buy new rechargeable batteries it has low or none charge at all.

Thanks for using fixya!

Try charging it for an hour even if it is indicating that it is already full in 10 minutes. If the battery still gets drained after a few shots, then you should change your charger.

Couldn't find a firmware upgrade for my Canon PowerShot A720. Tried putting a piece of rubber under the spring on the lid to make it tighter and it helped because I can take more pictures before I get the dead battery message (even thought they aren't dead). I bought the Duracell that you can check the charge on because I'm sure I've wasted dozens of batteries by now.

yeah if you have had it for that long the batteries might be dead even if the appear to be charged i would get new batteries or get a new camera get one cheap on eBay ! have a good day :)

Hello,
I have a Canondigital ixusi which had the same problem and I purchased three new batteries, but found that all of them showed the "replace battery pack" message when fully charged. I have solved this problem by cleaning all the terminals on the batteries and in the camera very thoroughly with alcohol and Q-tips. Even though the terminals look completely clean, there must be a slight film which is preventing good contact. The contacts in the camera are spring loaded and I suspect they are not making a very good conection to the battery so any contamination is making a high resistance to the flow of electricity. Hope this helps - it worked for me.

The solution is to change the small 'date/time' battery. You can have the regular batteries as charged as you like, it won't make any difference. The tiny date/time battery is in the same compartment as the regular batteries, on the opposite side of the hinge. Extract it with a fingernail, it is situated on the left hand wall of the battery compartment (when the camera is inverted and the compartment open).

use AA duracell batteries with high amps.

that would help you

simple! with my Canon S90 had the same problem until I changed the SD card from LEXAR for a TOSHIBA SD card and the message " Change the Battery Pack"disappeared.

I figured out the problem. My AA battery recharger was not making good contact, so although it said the batteries were recharged, this was not the case. After fixing this and getting full recharges, the problem went away.