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Can anyone recommend a battery replacement for this poor excuse of a cycling computer?

Ideally one that doesn't drain almost as fast off (properly powered off) as when on? When fully charged it's doing its job and survives quite happily for my typical 3-4h rides but for some reason it has this constant battery drain meaning I've grabbed what I think would be a fully charged unit to find it has virtually no power left. I don't understand this as it's a lithium ion battery which should only lose 1-2% of life per month. My device goes fully flat from full in under two weeks. The device is two years old and I ride about 3000 km per year.

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0 looigi over 4 years ago

I have no recommendation for a replacement battery but among the three 820s I've had none ever discharged excessively when fully powered off. It could be your battery or perhaps some other issue with the device. You might contact Garmin Support and see what they say.

You are aware that when the 820 is charging and charging current is removed, it automatically switches on. If, for example, it's being charged from a computer USB port and the computer shuts down turning off power to the port, the 820 will switch on.

0 Pearson210 over 4 years ago

I second your frustration. After the latest update, my Edge loses 20% of the power after 30 minutes of cycling. I have Battery Save Mode on, display light minimal, GPS only and phone connection/bluetooth off.

0 looigi over 4 years ago in reply to Pearson210

I usually point out that what you're seeing is the battery level indication goes down 20% in 30 minutes. What the battery level actually is may be different. I suggest letting the unit run down until it turns off, charge it up, and then see how it behaves. Sometimes this will recalibrate the battery level indicator and make it more accurate. If you are experiencing very short battery life. It may be helpful to do a factory reset.

Non-prompted Non-Vol Clear – (Factory Reset) Clears NV and deletes all FIT files including Activities, Courses, Workouts.

Turn device off
Hold Lap/Reset and Start/Stop
Press and release the power button
Continue to hold only Lap/Reset and Start/Stop
Release Lap/Reset and Start/Stop when the Garmin Logo is cleared
The unit will restart and clear non-vol

Saving settings for before reset

Folder Name	Contains	Copy contents of this folder to new unit folder:

Activities	Activities	Activities
Apps	Connect IQ apps	Copy prg files to Apps
Courses	Courses	NewFiles
HMD	Screen layouts for HMD	NewFiles
Locations	Saved locations	NewFiles
Records	Personal records	NewFiles
Segment_List	Leader board selection for segments	NewFiles
Segments	Segments	NewFiles
Settings	User profile and sensor pairings	NewFiles
Sports	Screen layouts	NewFiles
Summary	Activity summary from other devices	NewFiles
Totals	Activity totals	NewFiles
Workouts	Workouts	NewFiles
Multisport (Watches only)	Multisport settings	NewFiles

0 gonzlobo over 4 years ago

Battery life exceeds 8hrs on these computers. I rode yesterday for 5 hours and had 50%+ remaining.

0 steve over 4 years ago in reply to gonzlobo

It all depends what other devises you are using with the Garmin. I use a Wahoo TickR heart strap and a Varia twilight-radar. I don't get near eight hours. I get about 5.5 hours then it goes to battery save. By the time I finish at about six hours, I have 3% left.

0 steve over 4 years ago in reply to steve

Actually, that battery save feature may be more beneficial than just saving battery life. It keeps me from continually looking at this dumb devise and enjoy the ride.

0 Garmin-Matthew over 4 years ago

Battery life is completely dependent on the settings you are using during your ride. As for not during your rides, are you powering the Edge off or simply pressing the power button to put the Edge to 'sleep'? When not in use, I would recommend pressing and holding the power button and selecting 'Power Off'.

www8.garmin.com/.../GUID-83CA3524-0C2B-435C-BC4D-5FAC6E378659.html

0 danaurora over 4 years ago

This has been posted in other threads, but you can find the battery replacement kit and a video on how to do it at the link below. This company has kits for many different devices. www.newpower99.com/.../garmin edge 820.htm

0 looigi over 4 years ago in reply to danaurora

Be advised the original 820 battery is rated 700 mAh. The Newpower replacement is rated at 600 mAh. If your original battery is dying, the 600 mAh would likely be an improvement, but I expect it would provide less run-time than a fresh 700 mAh battery.

0 STODGYPUDDING over 4 years ago in reply to Garmin-Matthew

Hi Matthew, I fully power off the device. The battery just drains away. I don't actually have a problem with battery life when fully charged it's just I need to remember to charge the device the night before rather than putting it away fully charged and expecting any life in it when I go to use it next.