wow or cool, means you have had it a while, and i got the green stuff on me 801 batts, and noticed that they preformed less so i assumed it is time for new ones, then just made a SD to 801 dealie to keep on vapin...
was worried about green being a form of ....... and now i postit on the charger how many times i charge my auto batterys, 200-300. now on a sealed battery i think the stuff would go to the led end, but by the time u see it the battery is done.
just guessing. kina and others would know...
it got me to make the adaptor, and thinking about how to open up a 9 volt battery to use as a replacement to put in a 801/901 batt tube, yeah, needs the right vDC and mAh, but the battery package in our auto battery is a foil sealed tube of stuff and some bigger batterys use a bunch of simular stuff...
just rambling sorry