Paisley, good idea to be stocked up! The attys might become harder to get than something to power them. The DSE 905 is a kinda cheep (50 bucks) Chinese made Mod that holds a 14500 battery and operates at 3.7v, and has a 901 connection. One good thing about Mods is that the batteries will still be available and they are cheep. And, they last a long time. I think there are some better 14500 mods if you spend a bit more. Some are USA made. The 3.7v is not much stronger than a regular 401 batt that I think runs at around 2.9 to 3.1. If anything I think it has livened up some of my 401 attys. They work just fine on it.
The most important things that have helped me use my 40xs are the XL carts and... using a straight pin to help fill them. I just pop up the bucket, stick the pin in between the filler and the inside of the bucket, drop the juice on the pin (it runs right down), pull the filler back up to level w/ the top of the bucket, and add one more drop of juice if it looks like I can. Then I push the bucket back down w/ a rubber cart stopper. Sounds kinda tricky but it's not. I can fill three carts in 5 mins all w/ a diff juice. I mark the carts, and the juice bottles, w/ a small sticker so I can tell what juice is in what cart.
I tried using a syringe to fill carts for awhile but now like the pin deal better.
Oh, about those 901 batts anyone? How long do they last and at whay V. do they run at?
Joe