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Exchanging Trek Bion-X batteries

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Exchanging Trek Bion-X batteries

Old 08-16-12, 08:03 AM
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MK313
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Exchanging Trek Bion-X batteries

Has anyone here sent their Bion'x battery packs in to Trek to be exchanged/refurbed? After three years, mine is finally starting to show it's age & I need to send it in. I'm curious as to what the refurb service costs & how long it takes to get your battery back.

Thanks,
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Old 08-16-12, 08:04 AM
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I guess that should have read 'its' age, sorry.
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Old 08-16-12, 12:09 PM
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I would contact Bionx directly or a local Bionx dealer and ask how much they charge. You should expect about three weeks turnaround because the battery can only be ground shipped.
You may also want to try to replace the cells yourself if you are comfortable with the operation - you may be able to save some $$. They would need to be assembled and soldered first. I believe http://www.powerinmotion.ca/ can do that.
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Old 08-16-12, 12:32 PM
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Thanks for the reply. It's actually a Trek Fx+ with the Bion-x system, so i am planning to take it back to the local Trek dealer for repair/replacement, but I like to get an idea of what I'm talking about bofre I go in, as they don't really have a good grasp on the electric bikes. I'm pretty sure I have the only pedelectric bike they service. I'm definitely not electronically saavy enough to attempt the repairs on my own.

Thanks for the advice on the 3 weeks. That helps me make my decision. I'll wait until riding season is over to send it in.
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Old 08-17-12, 09:25 AM
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I have the Valencia+ and I haven't noticed much of a dropoff yet. I do a mostly 25 mile r/t commute and get to charge it at work and home so it never really goes below 50%. I have been wondering how much it would cost to replace the batteries so I'll keep an eye on this thread. It's been about 2 1/2 years I guess and 7 or 8 thousand miles.
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Old 08-17-12, 09:48 AM
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If your experience is anything like mine, you will notice the dropoff as it's fairly steep. I have the same number of years/miles on my FX+ (probably a little less miles, as my commute is a bit shorter,) but there is a monster hill on the way in to work, so I deplete the battery a bit more. The dropoff was pretty rapid.

I'll post back here once I have this done, if no one posts earlier with my results. Interestingly enough, it looks like Trek may have changed the battereis a bit on the new electric bikes. They no longer have the bump in the middle & they look flatter. They also claim 600 charges, which is significantly more than what we got back on the 2010 models, IIRC.
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Old 08-17-12, 10:41 AM
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The battery has about 600 full cycles before it drops under 70% capacity. If your trips take it down to only 50% of the charge you may be able to do almost double of the number of cycles - like 1200 or so. Never leaving it sit discharged for long periods of time and never let is sit in cold temperatures (optimum storage temperature is ~ 20 C or 68 F) will give your battery a long life.
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Old 08-20-12, 08:33 AM
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What about riding in cold temperatures? I'm generally willing to commute down to 20F or so. But I don't store it at those temps and it's usually in use when it is at those temps.
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Old 08-20-12, 01:03 PM
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The battery performance will drop at lower temperatures. This site has a lot of information:
http://batteryuniversity.com/learn/a...ased_batteries

I was thinking to buy or even build a neoprene sleeve myself to protect the battery from riding in cold temperatures. Something like this http://www.ebike-easy.com/products/B...PL-250-HT.html
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Old 08-20-12, 01:06 PM
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For replacing it looks like these guys may be able to build a custom replacement:
http://www.batteryspace.com/LiNiMnCo...e-scooter.aspx
Looks like it's in the $350 range so you should be able to compare it against the stock Bionx replacement.


See this if you ever plan on doing it yourself:
http://www.youtube.com/watch?v=TOFlk1zfpv8

Last edited by pacificstart; 08-20-12 at 01:46 PM. Reason: added youtube link
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