Question about Garmin Edge 305CAD

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My 305 edge wont hold a charge on the battery, is there anything I can do to reset the memory or is my battery bad?

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Hello. You will have to replace the battery. Joe

Posted on Sep 17, 2010

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Used my garmin edge 305 today on the ride, it worked fine, powered off after the ride. Got home turned on to review my stats and then powered off and went to upload and wouldn't upload, so tried to turn it...


Edge 205 or 305 often crash, then impossible to power on again.

Here is the way to reset the Garmin edge :

Soft reset : hold mode and lap/reset buttons for 10 seconds
Hard reset : device should be powered down, hold start and mode buttons for 3 seconds then pulse press the lap/reset button.

After soft reset, you need to hold start button for up to 10 secs before it starts.

After hard reset, you will loose all your data, including profiles.

Jan 30, 2011 | Garmin Edge 305 GPS Receiver

1 Answer

The edge 305 unit does not answer to hard and soft reset command


Just to be sure ...

Here is the way to reset the Garmin edge :

Soft reset : hold mode and lap/reset buttons for 10 seconds
Hard reset : device should be powered down, hold start and mode buttons for 3 seconds then pulse press the lap/reset button.

After soft reset, you need to hold start button for up to 10 secs before it starts.

After hard reset, you will loose all your data, including profiles

Now if this does not work, you should check battery. Does the device charge when plugged on PC ?
If it does not, either battery is out of order or the contacts inside the device re broken. This may happen if device is used in continuous vibrating environment like mountain bike.

Changing battery or fixing contacts issue is explained there :

http://blog.mtbguru.com/2008/11/06/surgery-on-the-garmin-edge-305/

Jan 04, 2011 | Garmin Edge 305 GPS Receiver

1 Answer

My Garmin 305 will not turn on. Battery will not charge nor indicate anything on screen. Will a replacement battery correct this problem? Where can I get it repaired near zip #23502?


Probably it's not linked to battery. Try resetting device (see on garmin support how to do holding mode&reset buttons).

Myself I can restart it if applying this, but it restarts only once, always same procedure needed to make it start.

Aug 22, 2010 | Garmin Forerunner 305 GPS Receiver

1 Answer

I will be riding a 340km 24 hr mtb stage race consisting of 6 stages in dec. How do I manage charging of my Garmin Edge 305 over what will be some 18hrs of riding with short breaks between stages?


Bring a portable PC device plus your USB cable, and a charged battery on your PC, Edge will charge when connected to PC via USB.
Any other powered USB source would also help charging.

However for a 24 hours trip, it is worth downloading your races on the PC and clearing memory, as otherwise memory will get full and waypoints will stop register.

Nov 09, 2009 | Garmin Edge 305 GPS Receiver

1 Answer

Ive not had my garmin 305 long, it will not charge or turn on.


This might just need a reset. To reset the Forerunner or Edge 205/305:
  1. Connect the device to the computer using the USB cable
  2. Press and hold the mode and reset (lap) buttons together for 10 seconds
  3. Release and wait for 3 seconds
  4. There should be some indication of battery charging (either Finished or In Process)
  5. Power the device on while keeping it connected to the computer
In addition, please make sure that the device has the latest software version available by downloading and running the WebUpdater program. To update the software, please use the following link:
http://www.garmin.com/products/webupdater/

Sep 21, 2009 | Garmin Forerunner 305 GPS Receiver

1 Answer

I am charging the Garmin Edge 305 for 24 hrs or for at least over night, yet the Edge 305 will show 2 to 3 bars of charges and will last maximum 1 hour of riding time. What to do?


Discharge completely device then charge again for 8 hours.

If not working, then attempt Soft reset :
Hold mode and lap/reset for 10 seconds then release.
Start the device then by long press on start. DEvice should start and charge then

Mar 16, 2009 | Garmin Edge 305 GPS Receiver

1 Answer

Garmin 305 is off and wont come back on.


You have to soft reset it first, and if not solving, then try hard reset.

Soft reset : hold lap/reset with mode key for some seconds
Hard reset : hols start and mode, then pulse on lap/reset.

after soft reset hold on/off for up to ten seconds before it starts.
after hard reset all data are lost

Mar 15, 2009 | Garmin Edge 305 GPS Receiver

12 Answers

Forerunner 305 won't charge


Question: My Edge or Forerunner 205/305 won't power on. Is there a soft reset that I can do?
-----------------------------------------------------------------------------------------------------------------------------------------
From the Garmin web site.
--------------------------------------------------------------------------------------------------------------------------------------------- Answer: If a Forerunner or Edge 205/305 is unable to power on, a soft reset can be performed to un-freeze it. This will not erase any user data and is most effective if the device is connected to the computer while performing the reset.
To reset the Forerunner or Edge 205/305:
  1. Connect the device to the computer using the USB cable
  2. Press and hold the mode and reset (lap) buttons together for 10 seconds
  3. Release and wait for 3 seconds
  4. There should be some indication of battery charging (either Finished or In Process)
  5. Power the device on while keeping it connected to the computer
In addition, please make sure that the device has the latest software version

May 26, 2008 | Garmin Forerunner 305 GPS Receiver

1 Answer

Distance and average speed don't compute.


My solution included changing the battery in the cadence sensor (GSC10). You might not need to.
1. After changing battery, take bike outside. Turn on Edge 305 to acquire satellites (might not be necessary..)
2. Press reset button on GSC10. Should see red/green flash.
3. On Edge 305, go to SYSTEM.
4. Scroll down to ACCESSORIES.
5. On Accessory page, scroll to bottom, under Cadence Sensor, and press RESTART SCAN.
That fixed my Edge 305 - cadence and speed do appear now.

Apr 07, 2008 | Garmin Edge 305 GPS Receiver

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