So I've been running CM6.1 RC5 since it was released, and I started using Slayher's LFY ROM (set for 250-800). I've been having issues with shortened battery life of late, but I figured since my battery is 13 months old, perhaps it was time for a change. I went out yesterday and bought the Extended Battery for the D2. Fully charged it up at my house, let it trickle for a couple more hours and pulled it off the charger yesterday evening.
Since it came off, I did a few e-mails and about a dozen text messages last night before bed, and had about a 15 minute call. I left it off the charger overnight as I want to completely drain the battery to properly set the high and low points. I played a few games of Solitaire this morning, checked and replied to work e-mails and have been listening to Stocker's music player for the last few hours.
Granted I've not taxed it real heavily, but I've not been not using it.