Hi guys,

After all the horror stories about drained batteries on this website and at the field I want to buy me some protection..

I might buy this http://www.horizonhobby.com/Shop/ByC...?ProdID=HAN111 it's a Digital Voltmeter/Tachometer. Do you recommend this? I heard it's a little less accurate... but hey, it's 2 in one right! :-) The tach would be kinda neat to have for the future...

And how do I measure if it's safe to fly or not... how much voltage should it indicate when it's fully charged and when it's not safe to fly?

I have a JR Quattro, 4 cell batteray 600 mah.