I regularly use my two AKG C747 microphones via a pair of TBP12 beltpacks, but there are two things to note:
- As Don says, I power them externally and
- The earlier version that I own (not the current V11) is far more susceptible to induced RF, be that from things like mobile phones, or from an XD-V beltpack, whenever either are close to the "barrel" of the (otherwise superb) AKG mini shotgun.
Sadly, I only know of ONE maker that builds fine sounding and compact battery phantom supplies that are rugged enough for "the road", with battery lives long enough for my gigs …and that's Deneke of the USA.
They have two versions, being their PS-1 (pictured) that powers a single mic, or the slightly more expensive PS-2 that's the same small size, but is able to power a pair of 48 volt condensers, even a pair of my current-sapping large diaphragm Neumanns.
Hopefully, the outlet I've linked below can ship to your location, but if not, you may need to use (and pay for) a forwarding agency, such as http://www.myus.com, if you cannot locate a supplier in your area.