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Should I change the battery on my bike?
Posted: Tue Apr 22, 2008 9:19 pm
by badnewswade
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!
Posted: Tue Apr 22, 2008 9:29 pm
by ChrisB
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
best bet is to hook them out and measure each battery and find the faulty one.
ChrisB
Posted: Tue Apr 22, 2008 9:44 pm
by badnewswade
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).
Posted: Tue Apr 22, 2008 9:53 pm
by ChrisB
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
Do you know the Ah capacity of the pack ?
ChrisB
Posted: Tue Apr 22, 2008 9:57 pm
by badnewswade
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.
Posted: Tue Apr 22, 2008 10:16 pm
by ChrisB
£36 a pop
How about rapid on line for £16.95
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 .
ChrisB
Posted: Wed Apr 23, 2008 8:14 am
by aminorjourney
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.
Posted: Wed Apr 23, 2008 9:22 am
by electricvehicles
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
Posted: Wed Apr 23, 2008 11:48 am
by badnewswade
Pub meet, now that's more like it!
Where is it and what time?
Posted: Wed Apr 23, 2008 1:48 pm
by aminorjourney
2nd May, 7pm at the Beaufort Arms, Stoke Gifford.