Originally Posted by ItsJustMe

Call me decadent, but I'd rather have convenience. The separate battery pack is something that you have to screw with every day. The battery going bad is a minor inconvenience maybe once every few years. It's not a GUARANTEE that it's cheaper to replace - a good 7.4v external pack is $50 to $75. I don't know that Dinotte would charge more than that to replace the internal pack if it went bad.

Also if their sales pitch is accurate, it's less likely to go bad - they say they're using mil spec cells and are intentionally underutilizing them to maximize cell life.