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PowerTap+ battery change questions

Old 02-07-11, 06:16 PM
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mvMcfly
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PowerTap+ battery change questions

I think my PowerTap Pro+ needs need batteries. I'm getting the following sort of power charts:

My question are pretty basic; I'm trying to become more self sufficient with my bike.

From their site: https://www.cycleops.com/expert-artic...batteries.html

It says to use the Cap Tool, I do not have one. Can anyone suggest a wrench that is compatible?

Also, I'm assuming these type of batteries: https://www.amazon.com/357-Energizer-...7121547&sr=8-1 are what I need.

Any other tips or things I need to watch out for when doing this?

Thank you for helping out the hopeless.
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Old 02-07-11, 06:37 PM
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I have used a large adjustable wrench when I could not find my Cap Tool.
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Old 02-08-11, 01:01 AM
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the 357s are the correct batts. the cap tool should have come with your powertap purchase. it is possible to get it off without the peoper tool but the parallel wrench flats are shalow- you do not want to screw those up,

if the power readings are inconsistent first zero, replace batts and try again. it is also possible that it is a warranty problem.in which case it'll go back to cycleops for recalibration...
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Old 02-08-11, 01:51 AM
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I'm not even sure a wrench would work. The idea of the tool I believe is to make sure you don't ruin the hub with real tools. Check ebay for a cheap one, otherwise borrow one or go to a shop and ask if you borrow theirs.
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Old 02-10-11, 11:14 PM
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I borrowed a cap tool from a teammate, running into a problem I do not understand.

I opened the cap, replaced the batteries with new ones, reinstalled the battery pack and relubed the O-Ring. After all of this I'm trying to re sync the wheel with my Garmin 500 and I'm getting nothing. I've taken the wheel apart 4 times and do not see anything wrong. The electronic connector is perpendicular to the hub as the How-To notes. Is there something not mentioned on the site or somewhere else that you need to do to get the unit to connect?

Thanks
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Old 02-11-11, 06:00 AM
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Originally Posted by electusunus View Post
I'm not even sure a wrench would work. The idea of the tool I believe is to make sure you don't ruin the hub with real tools. Check ebay for a cheap one, otherwise borrow one or go to a shop and ask if you borrow theirs.
A wrench WILL work, but it has to be large and it has to have stiff arms with a sharp-enough edge to not slip off the molded-in indentations on the cap. A BIG adjustable wrench like this is perfect:



Your hand will also work if it's strong enough - just grab and twist counter-clockwise. It's a standard "lefty loosey, righty tighty" thread.
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