Charged the battery for the recommended 8 hours even though the LED went green after 3 hours. It's a onetime thing, I see no need to tempt fate. The battery measured 4.09 V.
The battery fired the eGo each and every time from 10:15 AM - 6:30 PM while using about 1.5 mls of e-liquid during that time. The second to last hit was nearly as good as the very first one. The final hit, 8 1/4 hours later was noticeably weaker. I knew it was over. Sure enough the next press of the switch didn't fire up the atty. The battery voltage at that time was 3.49 V. This is significant because I normally need to recharge my batteries at 3.7-ish V.
After dinner when I fired up the eGo, the dear wife actually noticed the larger than usual plume of vapor without prompting from me. I'm not a vapor fiend. For me, it's about the TH. Mission accomplished toward that end.
There is a learning curve here with the eGo. It *does* use more liquid than my other devices/mods. Which makes sense.
Very early results, granted. A month from now we'll see how the battery holds up. So far, so good though.