weak battery vs check battery

[Ztater22]

can someone explain to me the difference between weak battery and check battery 

[giz_60]

Weak battery = The battery needs to charged or a higher rate battery needs to be used. If this error message happens, the DNA will continue to fire the atomizer, but will not be able to provide the desired wattage (throttling).

Check battery = The battery is deeply discharged & needs to be charged or is damaged. If this error message happens, the DNA will not fire the atomizer. User should recharge or remove & replace the battery.

[Ztater22]

i have a pair of 25r5 batts and keep getting the check battery at 30ish % batts are around 3.5v and when firing it drops to 2.8 and shows check battery im assuming batts need replaced would i be correct in my assumption?