Posted by a reviewer on Amazon

If you plug in a battery the corresponding led lights up but if you move the charger or battery at all the connection is immediately lost

Posted by a reviewer on Amazon

The other four ports work just fine so i dont think this is operator error but something wrong with the unit itself

Posted by a reviewer on Amazon

Anyway even having four charging ports at once is pretty awesome but of course it would be better if they all worked out of the box

Posted by a reviewer on Amazon

Longer flight time then the original

Posted by a reviewer on Amazon

I fly my symas without the camera and landing gear and get a great amount of flying time out of these

Posted by a reviewer on Amazon

They are however considerably thicker than the stock batteries and are a bit tougher to fit into the battery compartment easily so changing them out on the fly or in the field can be a little frustrating

Posted by a reviewer on Amazon

Id say they give you 24 minutes longer in the air on average

Posted by a reviewer on Amazon

It is not as flimsy as some other reviewers have claimed but it is also not as solidly built as other chargers that i own