Asked
— Edited

Is it possible to charge a battery while using it? Aka have the ez-b doing stuff while the battery charges?
Is it possible to charge a battery while using it? Aka have the ez-b doing stuff while the battery charges?
Well, right now im in a rut because to power the servos right off the v4 you need 4.5-7.2V. If I run the ez-b of 12v I'll need to either:
1. Regulate the incoming voltage, which depending on the regulator with bring down continuous amperage.
2. Use the 5V regulator attachments that Dj made and will be coming out soon and sacrifice the ability to run the hd servos at full capability.
If you think 1 could you try to find a regulator that has high amperage?
Charger---> Battery---> Voltage reg---> EZB
Provided the charging voltage is not beyond the maximum voltage of anything that's drawing power while charging (EZ-B or regulators) you should be fine. And chances are, unless you are charging in some weird, unorthodox and unsafe manner the charge voltage will be below that max voltage.
@Troy, you are correct, 17v is the max for the V3 (just to put your mind at ease).
@Techno You will probably struggle to find a decent regulator with high amperage (usually due to the PCB traces - don't take the actual regulator data for granted, if the copper isn't good enough for the load it'll cause problems). You may be better off using multiple regulators. You could parallel them to increase the current however be aware that this is not always exact and can cause slight differences in potential between the regulators. It's covered in a topic somewhere else here and also This topic on anandtech forum covers it too.
Troy gave the most help but rich you helped a fair bit too. I guess I'll give it to Troy
I'm late to the post on this but yes I agree -
As long as the equipment using power uses less than the charger is supplying the batteries will charge. If you are doing this on purpose like for example a charging dock then make sure your charger can support both the current from your equipment and also meet the recommended charging requirements of your batteries.