1. How can I preserve battery life with my Joule (non GPS, uses CR2032)?

Do you have the latest firmware (18.057 at least?)

Wired PT with carbon cutouts. Bought from a ST'er. Its been amazing!!!
Lost the LYC that came with when purchased. (Had the 2.4 on the side of the display)\

I was able to buy another one from a ST'er, as well.

However now the readings are all over the place. Barely pedaling reads at over 200w, speed seems accurate until stopped then it takes 15-30 sec before it reads zero mph.

Tried what i thought was the zero torque whatever thing, and it displayed 412.

I could really use your help!

Thanks Jesse or anybody else for whatever help you can offer.

Just did the firmware update to my G3 hub as outlined on the website as I was having issues with the hub going to sleep. Well, as soon as the update completed PowerAgent no longer recognizes the hub, and it appears to be dead, my garmin head unit can't find it either. Have tried multiple batteries. No one is answering the 800 number on the website. Is there another number I can try to get this resolved? With the exception of the odd sleep issue the hub has performed flawlessly and I would like to have it back!

Edit - realized that PowerAgent would still recognize the hub (no s/n info tho) with no battery installed, after multiple firmware update attempts it finally works again. Still not sure why no one answers the phone though!

I've been searching here, garmin forums and wattage forum and still haven't found an answer to this:

I have a G3 and want to know what the sequence of events are for it to autozero.

Does the G3 do an autozero on itself or is it only in the head unit only?

Is there some time limit to coasting that starts it?

I've been using a new Joule, Garmin 500 and a Garmin 310xt

jaretj

Does anybody know where I could find a 12mm powertap axle? All I can find are freehub bodies.
I don't know how it happened, but mine seems to have gotten bent somehow.

I have an 8 month old G3 hub which yesterday stopped communicating with my Garmin Edge 500. I replaced the battery. Still not recognised. I have tried to update the firmware following the instructions on Powertap's FAQ page but Poweragent doesn't prompt to remove battery as per instructions below. I have tried updating without battery in at all which has been suggested on some forums. Every time I try to update I am told there is a new update available (16.037) but at the end of updates I am told my hub has successfully been updated to 16.00. Regardless of all this, my hub ( with fresh battery) is still not recognised by my Garmin Edge 500.
On a PC

1. Open PowerAgent
2. Plug in PowerCap with battery IN.
3. Click "check for firmware update"
4. When it says that firmware update is available, click OK.
5. It will then notify you to take the battery OUT.
6. Disconnect PowerCap, take out battery, wait 10 seconds, plug in PowerCap (battery is still OUT at this point)
7. Click OK on the window that instructed you to take the battery out
8. Firmware will install
9. When it says that it was successful, unplug PowerCap
10. Wait 10 seconds, plug battery back in
11. Plug in PowerCap (with battery IN) and click configure device (button that looks like two blue arrows)
12. It will then tell you what version of firmware you have. Current firmware version is 16.037.

Yes, that's the version I am using.

The other day I received a "low battery" warning, and joule gave me the option to select "OK". I finished the ride, data was fine. Afterward I changed the 2032 battery in the Joule thinking that was the reason for the warning. Today I got the same warning, and selected OK. I was on the trainer using TrainerRoad.com, and shortly thereafter my power and speed dropped out (no reading) from trainerRoad, yet the Joule still displayed both.

Does that battery warning mean the hub battery is dying? When my Joule battery died the whole thing went dead.

I have an 8 month old G3 hub which yesterday stopped communicating with my Garmin Edge 500. I replaced the battery. Still not recognised. I have tried to update the firmware following the instructions on Powertap's FAQ page but Poweragent doesn't prompt to remove battery as per instructions below. I have tried updating without battery in at all which has been suggested on some forums. Every time I try to update I am told there is a new update available (16.037) but at the end of updates I am told my hub has successfully been updated to 16.00. Regardless of all this, my hub ( with fresh battery) is still not recognised by my Garmin Edge 500.
On a PC

1. Open PowerAgent
2. Plug in PowerCap with battery IN.
3. Click "check for firmware update"
4. When it says that firmware update is available, click OK.
5. It will then notify you to take the battery OUT.
6. Disconnect PowerCap, take out battery, wait 10 seconds, plug in PowerCap (battery is still OUT at this point)
7. Click OK on the window that instructed you to take the battery out
8. Firmware will install
9. When it says that it was successful, unplug PowerCap
10. Wait 10 seconds, plug battery back in
11. Plug in PowerCap (with battery IN) and click configure device (button that looks like two blue arrows)
12. It will then tell you what version of firmware you have. Current firmware version is 16.037.

What version of Garmin firmware do you have? There have been some issues on that side also.

Regarding the g3 update, having the battery in allows PowerAgent to read what version is on the device, unfortunately, it cannot update with the battery in. If PowerAgent happens to attempt to read the version but the battery isn't in then it will by default say version 16.00.

To check what version is on the cap:

1. Open PowerAgent
2. Plug in PowerCap with battery IN.
3. Click "check for firmware update"

At this point it should say your current firmware is up to date. If you still get stuck in the loop of it telling you there is a new version it might be best to give us a call. 800-246-5975.

This doesn't work. I did a 40km TT yesterday. The signal dropped once during the ride, and sure enough, the download showed up as 2 separate rides. I could not get them to merge. I already had 15 minutes set as the maximum time between rides. When I looked at the rides separately, it came to 44km in 1:05:xx, which is completely wrong. Is there any other fix to this merge issue?

All PowerTap hubs by default will auto-zero whenever you coast for more than about 3 seconds and your speed is greater than about 12mph.

I have a G3 paired to my Garmin 510. I did a manual torque zero offset before my FTP test yesterday and saw 502 on the calibration screen. On my next FTP test, should I keep on calibrating the unit until I see the same 502 offset in order to get a consistent/valid comparison between the two FTP values? For me, it seems harder to achieve the same power output at higher torque offset, say 505 or 512.

As long as you're within our recommended range (495 to 529) you won't see a noticable difference in the data.

Help!
Powertap SL 2.4 wireless was working fine with Garmin edge 500. Then garmin loses connection midride, so I assume its hub batteries. Replaced the two batteries and now the garmin cannot find the powertap. Not seeing the "powermeter detected" on screen.
ANT + Power:
I've rescanned it numerous times.
"sensor status" Not Connected
"sensor ID" 0
ANT + spd/cad also doing the same thing
Is the PT dead? .
I've had the unit since 2007.