Rockbox General > Rockbox General Discussion

Sony NWZ-A10: Battery indicator / adjust Battery

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Viper73:
Here are screenshots when the battery is close to empty.

Is there anything i can do to change the battery indicator/adjust the battery?

saratoga:
The kernel says the battery is low and the voltage reading agrees. What percentage does the UI say the battery is?

Viper73:
At this pictures it says something around 32 or 34%.
But just 5 minutes later the player shuts down because of an empty battery.

saratoga:
That is also consistent with the battery calibration for that player, which must be wrong. 

If you run the battery bench plugin on your player, I can fix the curve using the data it records:

https://www.rockbox.org/wiki/PluginBatteryBenchmark

Can you charge the player to 100%, plug in headphones, run the battery bench plugin, and set it to play an album of mp3s on repeat?  Once the battery is dead, plug it back in and there should be a battery log in /battery_bench.txt which I need to fix it. 

pamaury:
Hi,
just saw this post, I should have noticed it earlier. I did not calibrate any of the battery curves on the Sony's at the moment which probably explains the problem.
If you can indeed run the battery bench it would be great, otherwise I'll try to find some time to run it on all my Sony players. I will also check the Sony kernel source, it is possible that they changed the kernel interface between models and makes the battery voltage on the A10 completely wrong.

Another option in the mean time would be to use the battery "gauge" returned by the kernel. It is (supposed to be) properly scaled already but only contains 5 levels, essentially give 0%, 20%, 40% and so on.

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