# Mission 10 Battery Tester
# Objective 3 
from botcore import *
from time import sleep

def vbatt_load():
    # Turn on 4 LEDs & read volts
    leds.user(15)
    v = system.pwr_volts()
    leds.user(0)
    return v

def batt_level(v):
    pct = (v / 2) - 2

    if pct > 1:
        pct = 1.0
    elif pct < 0:
        pct = 0.0

    print("Batt Level:", v, "->", pct)
    return pct

# -- Main program --
print("Current load")
vb = vbatt_load()
my_capacity = batt_level(vb)
print()
print("Test loads")
batt_level(3.9)
batt_level(4.2)
batt_level(4.8)
batt_level(5.2)
batt_level(5.8)
batt_level(6.2)