Low battery message

For those of us just getting into this discussion, would someone please list the various methods that others have used successfully in dealing with the low battery message - including the toothpick method. Thank you!

My conclusion; The batteries are the problem.

The cause is the high internal resistance of the used batteries!

Many NiMh batteries have a high internal resistance for use in the A720.
The same applies to the alkaline battery, including those of Duracell.
The Electo 2300 mAh NiMh batteries that I had used, have an internal resistance of 500 mOhm!
The NiCad's Sanyo 700 mAh give no problems.
NiCad's have a much lower internal resistance than NiMh batteries.

The internal resistance can be determined by measuring the battery voltage with load and without load.
For the load I used a resistance of 1 ohm.
Discharge current is then about 1 A.

Example.
Without load 1.3 V voltage measured.
With load of 1 Ohm a voltage of 1.2 V measured.
The internal resistance is approximately the voltage difference measured in ohms.
The internal resistance = 1.3 - 1.2 = 0.1 ohms.

As far as I can see Sanyo NiMh batteries and in particular the Eneloop AA 2000 mAh, are a good choice.