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Battery 50% to dead almost immediately?

Posted: Monday 8. February 2016, 20:21
by Finewine
Mathias
Just returned from a dive holiday where prior to a dive the battery level was 50% but as Sport switched on and I changed display to show compass bearing the low battery warning appeared and within less than 5 mins the whole thing died!
It was a shallow dive and managed with my buddy and his computer to finish the dive, when I could replace the battery.
Why would it die so quickly from 50%?
What would you consider to be reasonable from warning to dead?

Re: Battery 50% to dead almost immediately?

Posted: Tuesday 9. February 2016, 07:24
by Rob
Hi Finewine,

the point is, that the battery level is an estimated guess and not a measurement.
OSTC thinks that the battery has an given capacity and reduces this given number during the runtime.
So, if the battery in real life has not this capacity, the calculation is wrong.

What battery are you using (original Saft)?
Maybe that was an old battery, or just a bad one.

Regards
Rob

Re: Battery 50% to dead almost immediately?

Posted: Tuesday 9. February 2016, 15:28
by Finewine
Rob
Yep, original saft 3.6 and use by 2017 so should have been okay?

Re: Battery 50% to dead almost immediately?

Posted: Tuesday 23. February 2016, 11:55
by heinrichsweikamp
Hi,

Which firmware was running on your "sport"?

Regards,
Matthias

Re: Battery 50% to dead almost immediately?

Posted: Saturday 27. February 2016, 21:19
by Finewine
10.23