66i not reaching 100% charge

Picked up a 66i last night and charged it overnight (12+ hours). In the morning when I picked it up, I noticed that it was still at 99% battery. I tried unplugging / plugging it back in, powering it on and off, etc, but it just remained at 99%. Curious if anyone else has encountered this? I understand the functional difference in use of 1% is minimal, but I just want to make sure it's working as intended before I pass the return window. Thanks.

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Garmin-Andrew over 4 years ago +1 verified

To follow up on this, if the battery on your GPSMAP 66i is stopping at 99% and not reaching 100%, the battery gauge can be reset by allowing the battery to drain completely until it powers off on its own…

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0 Garmin-Andrew over 4 years ago

Your GPSMAP 66i should be charging to 100%, if it isn't, it may need a software update -- even though it's brand new to you. Try updating the software with Garmin Express and if it still isn't charging to 100% it should be replaced, either by returning to the retailer or by contacting Garmin Product Support to have it exchanged. See: Updating the Firmware and Syncing Account Information to the GPSMAP 66i/86i/86sci

0 camhabib over 4 years ago in reply to Garmin-Andrew

I updated the GPS after receiving it. I've also tried a few different chargers, and it happens on each - it will reach either 98 or 99% and not go to 100% even after leaving all night. I'll exchange it for a new unit, the battery on this one also seems to be draining much faster than I would expect it to.

How do I go about switching my InReach subscription to a new unit once I exchange it with the retailer?

0 Garmin-Andrew over 4 years ago in reply to camhabib

Transferring Existing inReach Service to a New or Replacement Device

0 camhabib over 4 years ago in reply to Garmin-Andrew

So I picked up a new unit, updated it to the latest firmware, and same thing, stops charging at 99% and won’t reach 100% regardless of how long it’s on the charger.

0 Volker over 4 years ago in reply to camhabib

Strange. And you are sure, after unplugging device from the charger, the percentage doesn't change to 100% after some time?

0 camhabib over 4 years ago in reply to Volker

Because Garmin decides to only show a crude battery level on a device designed to be life saving, there’s no way to tell. I can get both devices to reach 100% if they’re charging from a battery pack, but from the wall outlet, both stop at 99%. I’ve tried a number of wall chargers too, including high speed USB and traditional. Same on both.

There are a number of other users claiming the same difficulty: forums.garmin.com/.../gpsmap-66i-charges-battery-up-to-99

+1 Garmin-Andrew over 4 years ago

To follow up on this, if the battery on your GPSMAP 66i is stopping at 99% and not reaching 100%, the battery gauge can be reset by allowing the battery to drain completely until it powers off on its own, then charge the device to 100%.

If the battery gauge still isn't reaching a 100% charge, please send me a PM to let me know and I'm happy to help out.

0 5628522 over 4 years ago in reply to Garmin-Andrew

I have a new unit and it is having the same issue. The battery will only reach 99%. I've allowed the unit to die completely as well.

0 Garmin-Andrew over 4 years ago in reply to 5628522

5628522 Have you updated the software using Garmin Express since purchasing the device? If not, please try that and see if it reaches 100% charge.

If it still isn't reaching 100% after updating to version 5.80 please allow the battery to deplete completely again, then charge to 100%.

To confirm the software version on the 66i, go to Main Menu > Setup > About.

If it still isn't reaching 100%, please send me a PM and I'm happy to help out.

0 camhabib over 4 years ago in reply to Garmin-Andrew

Updating the firmware seems to have fixed this issue for me.