Ranking batteries using a Battery Beak?

[DonRotolo]

Originally Posted by Billfred

While I know the most effective determination of battery health is something like a CBAIV, the Battery Beak is accepted as a very good way to check on a battery when you can't discharge it.

Given the data from a Beak, how do you determine the ideal next battery? State of charge? Internal resistance? V0/V1/V2? Any attempt to balance out match cycles? This thread had a lot of good information, but not quite that information.

The CBA4 is great for overall battery health, but not readiness for a match.

Internal resistance indicates the maximum current the battery can deliver, the lower the resistance the higher the current.

State of charge tells you, with some small inaccuracies, how fully charged a battery is, meaning is it ready to do its thing.

V0/V1/V2 tells you what kind of use you can get from the battery at different current draws, and for FRC the 18A value is the most useful. These values are somewhat related to internal resistance.

To determine which is the next battery to use in a match, we check SoC only, if it is OK we go with it, otherwise find another battery to check.

We do rank our batteries on internal resistance, the lower (better) ones get more play time.

Eventually all batteries go bad - then we recycle them...