Palm Treo 755 755p PDA Extra Capacity Extended Lithium Ion Battery 1350mAh

My Treo 755p came with a 1600mAh "standard" battery,

and all the "extended" batteries I've seen are 1800 to 2200 mAh.

The title for this item claims it's an "Extended" battery

and yet it only has 1350 mAh. That's less than the "standard".

Something isn't right. 1350 mAh is more like "battery lite"