My 2008 ford escape hybrid has to be jump started when not used in 2 days. Is the 330v battery is weak?

I'm in Ghana where temperatures range between 25 degree Celsius (75F) and 35 degree Celsius (95F).
My 2008 ford escape hybrid has to be jump started when not used in 2 days. Is the 330v battery is weak?
Will this problem stop if I replace the 12v battery?

Get both batteries tested.