2 of my spare batteries are showing the grey battery outline, with a yellow triangle and then a small battery with a line through it, when I try to charge. Both of those batteries were immersed in seawater for about 3 minutes, but dried out naturally inside the hiking pack pockets, until I got to the camp 4 hours later. I'd forgotten they were in the waist belt. After scratching back the corrosion and cleaning the little connections on the battery and making sure it's in firmly, I've been able to successfully revive both of the batteries. I also discovered that when one of the batteries moved, the icon popped up again. From this, I think the icon means that the connections are not all completely touching. This may not be helpful for Joe, but hopefully it will be for someone else. Good luck Joe. :)