Yeh like bluesnake said no lock. Did you get a chance to check those batteries that would not fully charge?
Hey rick,just got another question for you buddy,is there any way to lock the voltage buttons or not.It is no big deal but i thought i read somewhere that holding the + - buttons down for 5 seconds locks the device at what you have it set at.
I have tried this and it doesn`t work,as i said it is no biggie,just curious mate.