Parking my 1M DPS (The stats shown are of this one) turret next to my 25.1M DPS turret... Well, it does less after the update, not sure how much but it should be enough to take down the shields of pretty much anything in a second.
If I remember correctly, it has around 15m shields, 22m power regen (Going to up this a lot), and around 1 billion power capacity. Also sits at around 1.92 million AMC blocks.