The battery being used up quickly is highly dependent on how the application is designed and built. For instance, timers displayed on the screen will continuously degrade the battery because of the continuous screen painting that is required.
At Puzzazz, we have worked very hard to make sure our puzzle eBooks work optimally for the Kindle. You should be able to use them without quickly degrading the battery, and our puzzle collections should feel like a Kindle book (just like taking a paper puzzle book and bringing it to Kindle). Have fun!
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