[Timshel]

I can't imagine the hassle of having to charge five battery pack.

The bigger battery pack I found on amazon with decent reviews was 32000mAh for $119.99 (http://www.amazon.com/dp/B00DN0KBXU).

The trontium still cost more than two of those but the difference is shrinking.

[ndeine]

Yeah, you'd have to rig up your own charger (if you wanted to make it easy to charge) and USB power output manually, and then make those things effortlessly portable.

I've had a lot of experience with Li-Ion batteries and more advanced chemistries, and I have to say I'd be scared to try rigging up something that can handle the kind of amps the Reactor is promising.

The only lithium-ion-like batteries I know of that can handle any sort of reasonable amp draws (100W at 5-20V = 5-20A currents) are e.g. really modern LiMn2O4 (hybrid? I'm not sure) cells like [1], not standard LiFePO4 or whatever. So if they happen to have really nice high-draw cells in them, with protection circuitry added to each and all the stuff to make it safe, then they're definitely in the right value range. Keeping batteries from failing dramatically and exploding when subject to abuse, electrical or otherwise, is not trivial.

[1]: http://illuminationsupply.com/batteries-c-48_50/18650-sony-u...