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Unread 29-09-2014, 15:17
MrBasse MrBasse is offline
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FRC #3572 (Wavelength)
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Re: Which Battery to Buy?

Quote:
Originally Posted by Al Skierkiewicz View Post
Andrew,
If the charger is truly making only 2 amps per output, then batteries should not get immediately warm. Either the batteries are defective or the charger is making way more than 2 amps (as in the charge circuit is shorted). Even with defective batteries, the KOP charger takes a while to heat a battery. The documentation talks about the four charge cycles but it doesn't really explain if the charge current is average or maximum. In general, CCA testers put a very low resistance load across the battery. I would be interested to know the model of the tester you use.
This is the reason I can't recommend a Werker brand battery in this application. Ours were hand picked from separate shipments and both showed the same problems. Not a good sign for Werker in FRC. Their large batteries for NECA racing were great however. I will have to check on the tester as it is expensive and they don't let me play with it much. It lives at another mentor's house who owns it.

Edit: This is one of the ones that we use to evaluate our batteries. It is a micro-processor controlled tester that measures the internal resistance of the battery at no load, while measuring the voltage.
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Andrew Basse
Coach - FRC Team 3572 - Wavelength

Last edited by MrBasse : 29-09-2014 at 16:01.