[Al Skierkiewicz]

There is no real difference in battery life up to the 6 amp setting. Charging batteries when cold (<32F) or warm (>90F) will confuse the charger in some cases. Please be aware that batteries coming from a robot (practice or match) should be allowed to cool for 15 minutes before charging.
Please be aware that the charger does change settings. Have your electrical students include checking the charge settings every time they connect a battery for charge.

I highly recommend (read that please "perform this mod") that you purchase an additional 50 Anderson power plug and contacts to add it to the charger. The supplied alligator clips are meant for charging batteries with widely spaced terminals, not for our batteries. The Anderson connector can be purchased from AndyMark or from Powerwerx or any Anderson outlet.