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PostPosted: Wed Nov 01, 2017 8:46 am 
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Joined: Fri Oct 29, 2010 6:10 am
Posts: 107
If anyone is based in the US and wants to purchase an SRM, I am happy to offer advice and/or help with ordering. I can even extend a discount to forum members.

I'm a rider and racer first, and I've been a tester of other power meters. I've owned, tested, installed, and/or analyzed power files from just about every unit out there.

Happy to help anyone here out.

PS My take on the rechargeable battery thing: Last time I was in Germany I got a look at the then-prototype of the Origin meter, and I had a long chat about batteries. I know that the idea of recharging a battery is appealing, but with the long-life of the current models (1,900h & up for almost every unit), changing batteries is infrequent at best. It's also not a bad idea to have a meter in for servicing every 4-5 years -- new firmware, validation of the unit, etc., is valuable for these devices which can be used in harsh environments.

Also, the state of rechargeable batteries is such that their behavior when nearing depletion changes in a different way than non-rechargeable. IME in various applications, this can adversely affect discharge, and I've seen funny behavior from meters when voltage deviates even a slight bit from what is expected.

IMO, it's an extra charge, it requires user attention (I don't know what ACTUAL battery life is like from the rechargeable, but it is hard to beat 3,000h from some units), and it may exhibit odd behavior if a user is not diligent about keeping it topped up.

Further, rechargeable batteries DO require service; the memory effect means that batteries lose ability to hold a charge over time. This seems to happen even for those batteries that are not supposed to have a memory effect. Anyone with a mobile phone or laptop computer knows how these degrade within a few years. One may still send in the meter every 4-5 years anyway.

I think this was a bigger issue when battery life was only ~1 year.


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PostPosted: Wed Nov 01, 2017 2:05 pm 
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Joined: Mon Feb 05, 2007 5:39 am
Posts: 804
Location: Winnipeg Canada
It will be interesting come the 2018 season to see what the pro teams will be using.. If I recall Trek, Orica, and BMC were still using the 9070 looking crank and the new group through the season...


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Posted: Wed Nov 01, 2017 2:05 pm 


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PostPosted: Thu Nov 02, 2017 12:20 am 
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Joined: Sat Dec 13, 2008 6:28 pm
Posts: 177
Location: California
climber8 wrote:
PS My take on the rechargeable battery thing


Here is my take (perspective from ~8 years Li on bikes).

- Some Li have heat sensitive safety cutoffs. Cutoff can fire and permanently kill a battery on a bike stored in a hot car. Annoying.

- Recharge cables dangling off a stored bike are a problem. If you roll the bike forgetting to disconnect, you risk damaging the USB port. Likewise, if a family member walks by the bike and accidentally snags the cable, c'est la vie.

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2009 Look 595


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PostPosted: Thu Nov 02, 2017 1:43 am 
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Joined: Mon Apr 27, 2015 4:36 am
Posts: 574
The cables is a good point, but SRM is using their magnet connector system same as on the PC8. I've kicked and knocked mine around a whole lot and it safely disconnects each time.

Though the P2M NG looks like it could be an issue.

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bike | instagram | strava


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PostPosted: Thu Nov 02, 2017 2:21 am 
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Joined: Mon Jul 17, 2017 10:17 pm
Posts: 44
mds wrote:
climber8 wrote:
PS My take on the rechargeable battery thing


Here is my take (perspective from ~8 years Li on bikes).

- Some Li have heat sensitive safety cutoffs. Cutoff can fire and permanently kill a battery on a bike stored in a hot car. Annoying.

- Recharge cables dangling off a stored bike are a problem. If you roll the bike forgetting to disconnect, you risk damaging the USB port. Likewise, if a family member walks by the bike and accidentally snags the cable, c'est la vie.


The new shimano power meter has the equivalent of a magsafe connector, so that at least isn't a problem.


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PostPosted: Thu Nov 02, 2017 2:52 pm 
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Joined: Tue Jan 13, 2009 2:35 am
Posts: 775
glam2deaf wrote:
The cables is a good point, but SRM is using their magnet connector system same as on the PC8. I've kicked and knocked mine around a whole lot and it safely disconnects each time.


Yeah, I've even had the issue of the PC8 charging cable disconnecting too easily. So, I wouldn't be worried about catching it on a bike.


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PostPosted: Thu Nov 16, 2017 8:44 pm 
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Joined: Fri Oct 30, 2009 10:36 pm
Posts: 735
climber8 wrote:
If anyone is based in the US and wants to purchase an SRM, I am happy to offer advice and/or help with ordering. I can even extend a discount to forum members.

I'm a rider and racer first, and I've been a tester of other power meters. I've owned, tested, installed, and/or analyzed power files from just about every unit out there.

Happy to help anyone here out.

@climber8. I would like to contact you about the SRM Campagnolo Power Meter. I sent a PM but I don't think it went through.

_________________
It's all downhill from here, except for the uphills.


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