I guess
xtar doesn't know that yet. They say this about the VP1:
No offense to anyone, but I get tired of dealing with battery information. Everyone says something different.
Things either is or they ain't.
One... in your original question/post you asked about overly
charged batteries... not overly discharged ones. My post was directed at what you had asked about even if you had typed it wrong. In otherwords, my statement about a protection circuit being
blown would still apply.
A protection circuit that is simply enabled to stop additional drain on an overly discharged battery isn't "blown" unless there was a short that lead to an "run away" battery situation.
Harmonic already covered how a protection circuit works when a battery has simply been discharged to far and is correct that the battery can be recharged back but you can't undo any damage that may be done to the chemistry that may have shortened the lifespan of the battery.
These are technical issues and as such there are several details that also need understood as well. If you are going to be using rechargeable
batteries... it is good info to learn but it may take some time to get it just like any technical subject. You don't need to be an expert per se, but knowing the info will help you learn how to get the most life out of your batteries as well as how to treat them in a safe manner.