I don't know that particular mod, but I use both external and internal battery devices. If you think you're ready to start owning mods with batteries, and buying a good charger & batteries, I'd go with the P80. It's a great mod. Although keep in mind it's a single battery device, and the FJ200 is about equivalent to a 2 battery mod, so you'd get longer daily use out of it. I still use both a 2500mAh internal mod (as backup), and the P80. Nothing wrong with an internal battery mod, per se.