This is not news - it is all covered in the SHOT Show 2011 thread(s) and shown in SureFire's 2011 catalog...
SureFire proposes four new rechargeable 'dutylights' based around a new rechargeable body and revolutionary 4-Function TailCap (4FTC):
UAR "Aviator"
UBR "Invictus"
UNR "Commander"
R1 "Lawman"
(4FTC optional)
SureFire's proposed new Li-Ion rechargeable battery body looks set to feature a bespoke [proprietary] removable Li-Ion battery pack. It is so-shaped with a contacts tab/tongue that it will only fit and function in the battery body it is designed for. SureFire will also be offering a "lithium battery magazine" (cradle) for a pair of SF123As that can be used instead of the Li-Ion battery pack.
There is a socket for a plug-in (12V DC) power cable in the side of the body towards it's forward end near the fuel-gauge.
And SureFire Dealers should know better than to hype excitement for SureFire Vaporware - SureFire has strongly trended to releasing new products at or just after SHOT Shows [along with the proposed ideas for future products of course].
We all have plenty of experience of seeing SureFire Dealers and SureFire themselves being backed into a corner and 'forced' to give release dates we all know aren't going to happen. We shouldn't do this - it's not fair on them and it's not fair on ourselves.
If you want one of these proposed new SureFires the best way to go about this is to register your interest with your friendly SureFire Dealer (CPF-supporting of course), and ask them to keep one aside for you if/when they receive them and contact you to see whether you're still interested in purchasing it.
The saying goes - "It ain't released until my dealer has one ready to ship to me!"