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That's more or less the rule of thumb for images, it's not an exact science but even still if you're exceeding the limit you should seriously consider dropping the image count cause you're really taking up alot of memory and therefore battery power.
Can you please define rendered images?
For awhile I was using my own themes that had many images, mainly for the different variations of battery power(14 images) and volume level(18 images). Thinking that the number of images was one of the reasons of the poor Gigabeat battery life I drastically reduced the amount for battery power(5 images) and volume level(7 images).I feel there is a difference now... are you saying I'm mistaken?
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