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Battery Level

 
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Kremmen
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Joined: Mar 03, 2006
Posts: 6539
Location: West London & Reading

PostPosted: Fri Nov 30, 2018 3:32 pm    Post subject: Battery Level Reply with quote

If I plug my 2699 into Windows via USB and let it charge for hours (and hours) it never gets above 80%.

The 80% is shown by right clicking the device in Windows Explorer then Properties.

So, after some searching I found out how to get into the Garmins diagnostic mode, and that is showing fully charged.

So is Windows battery check flawed ?

My 2599 never gets abive 90% according to Windows.
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Privateer
Pocket GPS Moderator
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Joined: 30/12/2002 17:36:20
Posts: 4896
Location: Oxfordshire, England, UK

PostPosted: Sat Dec 01, 2018 11:30 am    Post subject: Reply with quote

Can't say about Windows, but I tend to just connect devices to a computer by USB for data transfer only. Any charging or powering of the device is only done for the duration of data transfer.

Is there a setting in Windows to only charge to a preset percentage? The 80% threshold may be for safety reasons.

If you use mains, battery power pack, or vehicle for charging the Garmin does it always charge back up to 100%?

Out of interest, how do you access the Garmin diagnostic mode?

Regards,
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cjay2412
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Joined: Jun 30, 2008
Posts: 102

PostPosted: Sat Dec 01, 2018 3:33 pm    Post subject: Reply with quote

it could be for battery longevity. lithium ion battery constantly charged to 100% are usually knackered after 12-18 months keeping the charge between 20-80% they can last for many years
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M8TJT
The Other Tired Old Man
The Other Tired Old Man


Joined: Apr 04, 2006
Posts: 10118
Location: Bexhill, South Sussex, UK

PostPosted: Sat Dec 01, 2018 3:58 pm    Post subject: Reply with quote

Agreed. But that does not fit the OP's case in point. Windows says 80%, device says 100%. Go figure.
I would like to know where K is getting the Windows reading from. I think he is being a bit secretive about that.
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Kremmen
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Posts: 6539
Location: West London & Reading

PostPosted: Sat Dec 01, 2018 4:54 pm    Post subject: Reply with quote

2nd line of my original post.

Do keep up Very Happy
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M8TJT
The Other Tired Old Man
The Other Tired Old Man


Joined: Apr 04, 2006
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Location: Bexhill, South Sussex, UK

PostPosted: Sat Dec 01, 2018 5:02 pm    Post subject: Reply with quote

Ah OK. But I guess that Windows is also guessing, badly.
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Kremmen
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Location: West London & Reading

PostPosted: Sat Dec 01, 2018 5:48 pm    Post subject: Reply with quote

Don't know how Windows calculates it, but it varies.

Tried it earlier with my 2599. When I first plugged it in Windows showed 100% then after a 5 minute trickle charge, USB3 port, it was showing 90%.

The 2699 varies between 80% and 90%.
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