Not sure exactly what you mean. For one thing, what is "L"? Usually batteries are measured in volts, or V.
I believe you meant to say:
"It is plausible that a battery was recharged from 40 to 45 volts by consuming electricity. However, it would be unacceptable for it to be recharged to 42 volts by consuming 45 volts. As we expect different results in the case of initially charging the battery, we will estimate this case once more."