Question about Garmin Forerunner 305 GPS Receiver
what kind of battery did you use to replace the original battery in the Forerunner 305. The Garmin 361-00026-00 seems not available, at least a web search did not come up with any results.
I have seen somewhere else (http://ctorunner.googlepages.com/dismantleforerunner205) mentioned that the Forerunner 305 battery look like an IPod (generation 4) battery. But so far I have not found any information about the size of these batteries, i.e. if they match the approx. 40mm x 35mm x 5.5mm of the original battery.
It's not always the battery, I assumed it was and opend mine up to check it out but the battery was OK.
Problem was the unit wouldn't start without pressing mode + reset followed by the power button.
I lifted the internal watch contact strips to put a better connection between the two halves but that made no difference.
I found that I couldn't delete all the history and the watch had recently turned itself off on a run after giving a low battery warning => the history was corrupted and caused the watch grief.
The only way I found to delete the history was to load a v 2.80 (or earlier) version of the watch s/w (current 2.90 doesn't delete history and there is no tool to do it!)
Fortunately I had a copy of v2.80 but the old version is not now on the Garmin site (that I saw).
Moral of the story, don't run your battery low for two reasons, Li-ion batteries lose capacity if you run them below ~30% and also if the watch "low battery" turns off while recording it can corrupt the history and really upset the watch.
At least I now know how to open the watch and have found plenty of possible small mobile phone batteries that will fit (Samsung have a few possibilities). The ABSOLUTE max size of a replacement battery is 36mm H x 43 mm wide x 5.8 mm deep.
If you go 43 mm wide you have to trim a couple of internal plastic ridges in the case.
Good luck and try starting after pressing mode + reset if it won't fire up then try and delete all the history.
Also DON'T run the battery low if you want it to last, Li-ion work opposite to NiCad and NiMH which should be fully discharged before recharge. You try and keep them above 50%.
Posted on Dec 25, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Nov 16, 2011 | Garmin Forerunner 305 GPS Receiver
Jan 16, 2011 | Garmin Forerunner 305 GPS Receiver
May 03, 2010 | GPS
Apr 01, 2010 | Garmin Forerunner 305 GPS Receiver
Jun 17, 2008 | Garmin Forerunner 305 GPS Receiver
5,081 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: