Hi,
Being an avid Photographer, I have several sets of radio shack Nimh rechargable AAs I use for flash equipment. I have been rotating these batteries with one set in the recharger at all times. I have been continually tweeking my Pronto and thus, would characterize my use as "heavy." I received my Pronto from Jack at Metronet on November 27, 1998. I have used about one fresh charge one these battereis in the intervening 12 days (I say about because I replace the batteries when they show about half drained).

BTW, I also noticed that standard AA do not sit very securely in the battery compartment. After a while, one or more of the batteries would momentarily loose its connection and Pronto would lock up. The immediate cure was to remove and reinsert the batteries. To prevent recurrence, I have used a small foam rubber insert to hold the batteries more securly in place - no problems since.

Clay W.