As much as I dislike opening and closing the sealed battery compartment on a dive computer to be used at depth, I can hardly imagine knowingly buying a dive computer that required the battery to be extracted and replaced every 6 dives (or thereabouts). Even if I never flooded it, it'd be a tedious repetitive aggravation and an ongoing anxiety.
If LiquiVision is listening, I'd like one that has a 'plug the unit in' recharging option like the Cobalt, where it is not necessary to open the unit to recharge the battery. Even then, 6 dives/charge seems ridiculous to me, especially since I'd think that over time the rechargeable battery would lose some of its effectiveness. But I'd be more inclined to make do with it than if I had to open the thing up.
Now, that would make a decent ScubaBoard poll; what's the minimum # of dives/battery (charge) that would make you pass on buying an otherwise fine dive computer that would have met your needs?
Richard.