Should I change the battery on my bike?

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badnewswade
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Should I change the battery on my bike?

Postby badnewswade » Tue Apr 22, 2008 9:19 pm

Hi there - does anyone know what the 36v lead-acid batteries in an electric bike should charge up to?

I'm pretty sure mine have lost some capacity; they go up to 40.3 or so and then drop down to 39.8 or so shortly after charging.
I'm sure they used to go up to 42.0! and they've lost a bit of their pep. Sadly I lost the mileage spreadsheet on my computer, so thought I'd ask around.

Any ideas? Nikki?

Cheers
Andy

PS I will get around to joining the BVS soooooooooon, honest! :wink:
34 Watt Hours per mile, or > 700 MPG. What, me, smug?
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ChrisB
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Postby ChrisB » Tue Apr 22, 2008 9:29 pm

I'd say you should be looking at 41.4 volts to 42.6 volts or there abouts.

Sounds to me like you've got one battery with a cell thats gone down :cry: best bet is to hook them out and measure each battery and find the faulty one.

ChrisB
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badnewswade
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Postby badnewswade » Tue Apr 22, 2008 9:44 pm

Good plan - am a bit frightened to open the case really, don't want to break my luvly bike (which hasn't given me any trouble for ages, apart from a slight electrical problem which I soon fixed).
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ChrisB
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Postby ChrisB » Tue Apr 22, 2008 9:53 pm

Sadly it sounds like your going to have to , I suspect you'll find 3 sealed Yuasa 12vots of some sorts, and it will be one of those which will have gone poof, or do you have nicads ??

If its 12volts yuasa types then I might be able to help :wink:

Do you know the Ah capacity of the pack ?

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Postby badnewswade » Tue Apr 22, 2008 9:57 pm

Supposedly they're 14 amp-hour sealed lead-acids. Do you have any of those? The Bristol Battery Shops selling some kind of 12v batteries for about £36 apiece but I think they might have got the ampage wrong.
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ChrisB
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Postby ChrisB » Tue Apr 22, 2008 10:16 pm

£36 a pop :shock:

How about rapid on line for £16.95 8)

Details to find out if their batteries will fit available here

http://www.rapidonline.com/netalogue/specs/18-1168.pdf

Page where the batteries are located is here

http://www.rapidonline.com/productinfo. ... ef=18-1168

I havent got any 14ah units I'm afraid .

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Postby aminorjourney » Wed Apr 23, 2008 8:14 am

Andy,

I now have my Sakura back but my batteries are in a bit of a state too.

Can you make it to the pub meet on Friday May 2nd?

Nikki.
Nikki Gordon-Bloomfield

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electricvehicles
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Postby electricvehicles » Wed Apr 23, 2008 9:22 am

Hi Chris

Prices for the HZS12-14 batteries are very good indeed. However they can be beaten :) How does £14.12 sound :?:

Please PM me for further prices
Regards
Dave
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badnewswade
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Postby badnewswade » Wed Apr 23, 2008 11:48 am

Pub meet, now that's more like it! :D

Where is it and what time?
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aminorjourney
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Postby aminorjourney » Wed Apr 23, 2008 1:48 pm

2nd May, 7pm at the Beaufort Arms, Stoke Gifford.
Nikki Gordon-Bloomfield

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