I'm pretty stuck in my ways as a user of tank/titans for the last few years but am worried about possible need to change because the stock of XL manual titans seems to be dwindling and never seems to restock. I saw the 40% off sale a couple days back and appears my options for a manual XL titan are yellow, lime green and white. My old favorite was XL titan stealth, and I'd sent email a few times a year back asking when they would be re-stocked, and was advised "a few weeks" but that never happened. Are Titans on the way out? If so, are there any other comparable voltage (and compatible with V4L tanks) 808 batteries on the market?