Looks like you're seeing about as much as you're going to have with them.I'd email Venom and let them know you're not too pleased with their batts. Were they cheap? I bought a few Venom stick pacs a some time ago for ezstarters and etc, and they were cheap Chinese cells. I felt like I got what I paid for though and they did ok for about a year.

Unfortunately, with batts, you seem to get what you pay for.

One other idea - read the repeak part on about your Ice charger and try repeaking them to see if that generates any increase in capacity.