Originally Posted by
znomit
I was looking to replace the battery on mine, as it now struggles to get much past 10 hours (20+ when new) but I'm now convinced its a problem with the unit itself not the battery as there are plenty of unhappy 520 owners out there.
eg: I did a runtime test with the backlight left on full, it took a little over three hours to get down to 3%, but didn't shutoff until just over 5 hours. I wonder if the battery management changed in a software version.
The 520 struggled with battery life after some firmware updates last year. Recent updates appear to have fixed the issue and, at least for me, the battery life is now acceptable. I don’t spend 20hrs on the bike in one sitting though.
The battery fuel gauge remains inaccurate and, as you mention, will continue to operate long after the ‘low battery’ warning.