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PostPosted: Thu Feb 09, 2012 3:21 pm 
MacRetro rider
MacRetro rider
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Joined: Fri Mar 09, 2007 2:11 pm
Posts: 8719
Location: DUNDEE
here you go...


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PostPosted: Thu Feb 09, 2012 6:02 pm 
retrobike rider
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Location: Plymouth
Blimey. Defo gonna quickly take mine apart when I get in. That is freaking terrible! Incidently.. mine was also sealed against water incursion.


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PostPosted: Thu Feb 09, 2012 6:08 pm 
MacRetro rider
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Location: DUNDEE
I've ordered another from that link above, I'm tempted to take it apart before I use it to see what it is like "new" They aren't waterproof anyway so new heatshrink and perhaps a home-made silicone case with prevent further issues.


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PostPosted: Thu Feb 09, 2012 6:18 pm 
retrobike rider
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I am gonna go out on a limb here and say that the problem is not caused by water. I reckon it's caused by badly chosen metals/solders and possibly even some chemical leakage aiding corrosion from the batteries themselves (although I don't know if lithium batteries tend to leak?)


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PostPosted: Thu Feb 09, 2012 6:37 pm 
MacRetro rider
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Location: DUNDEE
I agree, I think is is a venting issue with the heat build up aiding corrosion.

I'm starting to think my totally sealled clingfilm method might have been part of the cause....

Quote:
Lithium-ion batteries produce gas while operating, so its container needs venting to prevent the battery from exploding. Lithium-ion batteries also produce heat, so the container must have a shutoff switch to prevent the battery from overheating.

Read more: How to Construct a Lithium-Ion Battery | eHow.com http://www.ehow.com/how_7637452_constru ... z1luJBXkZs


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PostPosted: Thu Feb 09, 2012 7:04 pm 
retrobike rider
retrobike rider

Joined: Tue Mar 01, 2011 6:44 pm
Posts: 307
Location: Plymouth
My corrosion is VERY minimal. My batteries are orange and bizarrely have the lettting scrapped off them! Obviously something they didn't want us to see.

Looks like the main positive connector (sorry.. "thin strip of metal") has burnt out. Batteries are actually perfectly fine and almost in balance.

Oooo actually.. just seen some corrosion/possible heat damage from the circuit board. Will take a look after dinner.


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PostPosted: Thu Feb 09, 2012 7:08 pm 
MacRetro rider
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Joined: Fri Mar 09, 2007 2:11 pm
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Location: DUNDEE
one of the chips on mine has the numbers scraped off the top, I think it is common practice and might denote "seconds" type components.


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PostPosted: Thu Feb 09, 2012 7:34 pm 
retrobike rider
retrobike rider

Joined: Tue Mar 01, 2011 6:44 pm
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Location: Plymouth
Circuit board was facing downwards against the battery. Looks to have a little corrosion on it and on the chip legs unfortunately.

Will see what I can do with it. I just checked the chipset, and I think it's screwed, will need a new circuit board. Batteries themselves appear to be fine.

Think I will have to put pics up tomorrow as I have to go out.


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PostPosted: Thu Feb 09, 2012 7:46 pm 
MacRetro rider
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Joined: Fri Mar 09, 2007 2:11 pm
Posts: 8719
Location: DUNDEE
where can you get the circuit boards? that's all mine needs


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PostPosted: Thu Feb 09, 2012 8:09 pm 
retrobike rider
retrobike rider

Joined: Tue Mar 01, 2011 6:44 pm
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Location: Plymouth
Maybe deal extreme or ebay.


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