def get_battery_wear(min_charge, max_charge):
     poz = 0.00
     for val in range(min_charge, max_charge):
          if val in range(0, 50):
               poz = poz + 0.01
          if val in range(50, 80):
               poz = poz + 0.04
          if val in range(80, 100):
               poz = poz + 0.1
     return poz

print(get_battery_wear(0, 50)) # => 0.5
print(get_battery_wear(20, 35)) # => 0.15
print(get_battery_wear(50, 80)) # => 0.04 * 3 = 1.2
print(get_battery_wear(60, 80)) # => 0.04 * 2 = 0.8
print(get_battery_wear(80, 100)) # => 0.1 * 2 = 2.0
print(get_battery_wear(0,100)) # => 3.7