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Unread 08-10-2008, 23:36
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Eugene Fang Eugene Fang is offline
The Blue Alliance
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Team Role: Alumni
 
Join Date: Jan 2007
Rookie Year: 2000
Location: Bay Area, CA -> Pittsburgh, PA
Posts: 772
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Re: First: 2008 Batteries are D-Y-I-N-G.

We had quite a few batteries die on us. We think it is because, during a demo, we drained them very low, like 5 volts on the OI low, causing the plates inside to corrode.

When "charged," the voltmeter says the battery's voltage is fine, but it cannot deliver enough current to run the robot. So as advice to all teams, NEVER discharge your battery to the point where, on the OI, it reads a very low voltage.

We wasted a few practice rounds at SVR last year because we were putting batteries that said 13+ volts on the voltmeter on them, but couldn't deliver current, so the robot couldn't move.
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Eugene Fang
2010 Silicon Valley Regional Dean's List Finalist

Various FLL Teams - Student (2000-2006), Mentor (2007-2010)
FRC Team 604 - Student (2007-2010), Mentor/Remote Advisor (2011-2015)
FRC Team 1323 - Mentor/Remote Advisor (2011-2014)

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