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I am building up a couple of F4S cameras, replacing parts that work, but are not \"pristine\". This MB-21 Battery pack is one of those parts. It works fine. Tested in all shooting modes and the ONLY issue is that the \"battery Charge display (two little red LED\'s do not light up). This is due to the MB-21G section, not the lower (MB-21B). I tested this with a working MB-21G and the LEDS DO Light up. So, as I have two, I\'m letting this one go. The price is firm as I know this works. There are no refunds on vintage parts. This would make a great back grip, or put your own, working MB21G on it, and you\'ll be good to go.
I\'m only selling it because I want my cameras in pristine condition in the field. (yes, I\'m using them). Or, if you\'re a collector with a non-working F4 on display only, this will be a perfect add on at a reasonable price.
