I have several different packs. Not sure what you mean about ofna, etc. Mine is a Digipeak Predict Charger. It will tell you ammeter charge rate, voltage, and mah. Model is 1855. I like the charger , just want to check my packs if possible. For instance:

A 1900mah pack. If I peak charge, then discharge, what mah should I get at max discharge?

When checking a pack like this, should you charge then discharge then recharge to get accurate mah? What mah should you discharge at to get most accurate mah info.

How long should a pack hold voltage?

Thanks
Doug