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Unread 08-02-2008, 15:35
Unsung FIRST Hero
Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al WFFA 2005
FRC #0111 (WildStang)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1996
Location: Wheeling, IL
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Re: Large Backup Battery

Quote:
Originally Posted by gurellia53 View Post
Our team is using AndyMark Super Shifters this year with servo shifting. I've read here on CD, and found out through testing that the servos drain the backup battery very fast. My question is are we allowed to take 12 NICAD cells and wire it so that we get 7.2 Volts, but twice the milliamp hours? (6 parallel pairs in series)

I know its not legal to use 2 batteries, but I believe this would be considered 1 battery.

Thanks,
Andrew
Going out on a limb...NO. Never parallel batteries.
You can buy larger capacity battery packs from places like Digikey. You can also use the IFI onboard charger (although I don't personally recommend that). I believe Digikey has packs up to 1100 maHr.
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Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
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Storming the Tower since 1996.