//will always drain until target value reached
void Update()
{
if (!reachedTarget)
{
float perc = Time.deltaTime / timeToDrain;
float diff = battery.totalCapacity * perc;
battery.Sub(diff);
if (battery.CompareCapacity(targetDrainLevel) < 1)
{
if (continuous)
{
targetDrainLevel = battery.NextTargetEnergyLevel();
}
else
{
reachedTarget = true;
battery.SetCapacity(targetDrainLevel);
StopDrain();
}
}
}
}