While browsing the internets I may have found some useful information. I was reading about the battery charging red lite problem on the vholdr and came across this: On Vholdr's actual site forums a guy mentions that the battery is the same as a BL-5C nokia battery. This was a response from one of the VholdR owners.
"Naturally you might have a tougher time getting support if your "non-VholdR" battery blows up in your camera, but I think we can all bet that's probably not going to happen…
We have them as accessories as well for $30 which I believe is pretty comparable, but we're not in the business of selling Lith-ion batteries, we do video, so it won't break our hearts if you get your battery elsewhere."
This means that you can get batteries for much cheaper. I have ordered a couple generic replacement nokia batteries off ebay for 15 bucks to give them a try. The ones i bought are 1020 mah which are a little higher capacity than the stock vholdr ones. I did a search, and others seem to be using them without problem, so im going to take the chance on them, figured others may want to know!