weights

I heard that a weight belt used to be made that had batteries in it. It was commercially made and as I understand it, was used for lights or cameras. Does anyone have any information about it? I would appreciate it. If this is not posted in the correct forum, please let me know. Thank you.

New Old Stock lead weight mold for Scuba diving weight belts. $50 OBO. Full capacity is 12 pounds, but you can mold weights in lesser amounts if you wish. Curved "hip weight" configuration for comfort. Weights fit standard 2" weight belt. A bit dirty from garage storage, but unused. Shipping...