RCU Forums - View Single Post - New 1100 mAh A123 available everywhere and no word here!
Old 10-26-2008, 07:51 AM
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everydayflyer
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Default RE: New 1100 mAh A123 available everywhere and no word here!

In my foam FW-190, the 3S A123 pack had noticeably less power right from the start than the 3S 1500 mAh 20C pack I've been using and in just a couple minutes in the air the battery sagged to just enough for a very quick landing. On the ground, I could hold the tail and gun the motor and watch the pack sag to nothing. Total run time (including the big sag) maybe 3 minutes total.
A fully charged 3S LiPoly starts at 12.6 volts and under a moderate to heavy load is 10 to 11 volts.

A 3S A123 1100 starts at 10.8 volts and under similiar loads is approx. 7.5 volts. There is good reason wht SOP is to use a 4S A123 to replace a 3S LiPoly.

As mentioned A123s also require a lower LVC. Standard for them is 2 volts per cell. In contrast 3 volts per cell LVC for LiPoly and 3.2 is much better/ safer for them.

Charles