So this is a little bit of a cross post of a similar thread in the Monomachine forum: Portable Battery to Power Elektron
But seeing as the idea is so awesome I figured it should also get some attention here.
The concept is fairly simple; using a ‘powerbank’ type of battery to supply the A4 with 12VDC at 2A so you can use the A4 outdoors/on-the-go without a power outlet nearby.
The Tekkeon battery originally discussed in the topic above is no longer on the market but then marcusmono made a great discovery in the XORO MPB2000 battery which has a 12v or 19v DC output (so not suited for OT, MnM, MD but should also work on the AR).
It sells for only 80 bucks and will give you about 4,5/5 hours of ‘unplugged’ A4 fun on a full charge.
It’s available in europe under the XORO MPB2000 brand (I’ve seen it in Germany, Netherlands, UK). It will supply 12v or 19v at 2A which is suited for A4/AR power requirements (not OT as it needs 9v).
There’s also an identical looking battery sold in the States branded as Anker (Anker 2nd Gen Astro Pro2). However the Anker battery supplies 9v or 12v at 1,5A which also works for A4/AR (and should even work on OT)
Some amazon links:
http://www.amazon.com/Anker-20000mAh-Aluminum-Multi-Voltage-Technology/dp/B005NGLTZQ/
And here’s a proof of concept sitting in the park this afternoon: