Originally Posted by
artron9
How can I determine which battery to use. I am running a Hobbywing combo. 21.5 brushless motor with a Justock XR10 ESC. Currently, I am running with a Venom 30C 2S 5000mAh 7.4 Lipo. I am not racing this car. I have a Hoovo 80C 7.4 V 5000mAh battery. Will this battery be safe to use?
So you multiply the C rating times the capacity to get the load that the battery can handle, so in this case it's 30C x 5Ah = 150A of constant current
Then you can cross reference the following chart to see that the 21.5T motor will pull a max of 32A which is no where near the limit for the battery:
https://www.hobbywingdirect.com/prod...30318655340659
What will be more important is to track the health of your batteries as they age, you do this by checking the IR (internal resistance), more info here:
Which charger is the best?