I believe the MD4 used on the F3 is the only one that also supplements the in-camera battery.
As a side note, Minolta made TWO versions of the Auto-Winder G and one (GP? is hard to find and more expensive as a result) powers the camera as well as the drive. Works on any X- camera except XD and XK. The regular Auto-Winder G goes for about $10-20 on EBAY. Soligor/Kalimar/Centon/Spiratone/Seagull/Phoenix/etc. sold improved G winders with remote releases, intervalometers, etc.
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