Rockbox Development > Feature Ideas

Uodated Battery Options

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prodtfm:
Hello all,

It has been a few years since bigger battery options have been in the modding scene. It would be really nice to get some updated options for more accurate battery times, since (at least for ipod video) the biggest size is 1400. Its really annoying to always show low battery on my 2500mah cell. I know this is very very minor... But it would be a very welcome addition :)

Thanks,
tfm

speachy:
The "capacity" is only used for runtime estimation, and especially in the modern era of wildly-varying SSD mods is going to be inaccurate.

The actual "battery level percentage" is based on the battery _voltage_, and for a given battery chemistry, will be fairly accurate with different capacity batteries -- as long as they share the same chemistry (and therefore, discharge curve) as the original iPod battery.

Given the sheer variety of replacement battery options (manufacturer, capacity, quality) the odds are high that there is a wide variety of battery chemistries in use.. so we have no way of knowing what your (or anyone's) battery's discharge curve looks like.

So.  If you want a more accurate battery meter for your player, there's a so-called "battery benchmark" plugin that you can run to generate a voltage-over-time data set that can be used to create an updated table.  The idea is that you start with a fully charged battery, start something playing (on repeat), and launch the plugin.  It will run until the battery dies completely.

prodtfm:
Thanks for the information! That makes complete sense now in hindsight. I will definitely have to run that plug-in whenever I can part with my ipod, for the two or so days it will take. It will be great to know proper levels, so I'm not accidentally charging my cell at improper times. Again I really appreciate the  help:) Have a great weekend

tfm

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