CPU/Battery usage - Bias FX2 vs FX1?

[Chaz Winter]

Hello,
I purchased Bias FX1 just over a year ago to use with an older ipad. Unfortunately, I had to stop using it, because it completely destroyed the ipad's battery life, to the point where I couldn't even finish a single set in rehearsal before the ipad died.

I'm finally willing to give it another go (with a newly purchased ipad Air), and I'm thinking about taking advantage of the sale for Bias FX2. But I'd like to know how it compared to Bias FX1 in terms of battery usage. About the same? Have they figured out a way to use less power in the new version?

Alternatively, if anyone has found a way to charge the ipad with a power bank while also using the lightning port with an iRig, that would help me immensely as well. I'd rather not connect a powered USB hub, as my entire live guitar/vocal setup is wireless, so this would be the only thing that needs a power cable running off the stage. Thanks!