Battery self-test failure in mains mode means that there is no battery in mains mode, because the self-check fails only if there is no battery, and the battery cannot be charged at this time
Power mode battery self-test failure is the power mode battery no, because only the battery does not occur self-test failure, at this time the battery can not be charged
The failure of battery self-test in mains mode means no battery in mains mode, because the failure of self-test only occurs when there is no battery, and the battery can not be charged at this time<br>