what charge current I should use?

[Urgeoner]

Thanks you guys! I just read that in the user guide lol, I figure I'd use 8A but since yall said you'd use 5A then I'll just stick with 1c...
Here's my next question:
So I can read 22.4v at the battery ouput, but when I connect it to the charger and I do the *Battery Check* function, it says "battery output error" like its not connected...any thought on this?