Surf every day, often 3-4 sessions. The shark Shield didn’t skip a beat, charged up easily in the car and didn’t bother the car battery, even though it didn’t really have the engine started throughout. Only time it went flat in the water was after about 6-7 hours over 3 sessions without a charge.
Breaking hard 5-6ft on occasion but hardly noticed the Shark Shield (mounted on the board), except the odd kick after getting cleaned up and rolling in the white-water, resulting in the antenna wrapped around the fins and electrode on the board deck. But that was easy to fix with a couple of spins of the board freeing the electrode.
Very happy to have it in the water for my last session, when I was out by myself about 7pm and a shark fin appeared about 20ft away straight in front. Nevertheless, thinking that discretion is the better part of valor, and mechanical equipment usually fails when you really want it, I paddled in (feeling very relieved and confirmed in my use of the Sharkshield). Psychology is everything when it comes to enjoying time in the water…
All the best