I wanted to takeoff but it got error message "Charging battery required" and "Battery level low. Charge battery(code: 30078)"

The battery was 30% and temperature was 20°C and the voltage is 7.53v (both cells at 3.77v)

I did some research and i found that a similar error message "Battery power low. Charge or warm up battery" along with "Battery power restricted" and "Battery power insufficient". But these are for when battery is cold. But i didnt flew in cold.

I mention that battery is over a year old and 118 cycle counts. And this is most likely a cause.

Can anyone help me on this?
Photo in comments because forum doesnt allow photos on main post