I currently use mxjo batteries and they've served me wonderfully, but being that my job has me on road all day without time or capabilities to charge them. This got me thinking and spp I started looking for laptop batteries that could potentially carry Sony vtc5 cells within. I searched eBay and to my surprise have found a Sony vaio battery pack with 7800mah and 11.1v which would perfectly match that of 3 vtc 5's. It looks like it could hold at least 3 but before I spend the $20 I thought I'd check in here for any input. Thanks.