Recently picked up Echo's battery equivalent of their CS-2511T, which I also have. I've run through about 8 battery charge cycles so far. Weight is about the same as the loaded 2511T. Both have 12" bars with 3/8lp chain. They share the same mount so I can swap bars. Cutting speed is comparable yet power application is different. The 2500T will stall easily if you lean on it, but if you let the chain feed itself it cuts as fast as the 2511T, maybe faster on small stuff. In other words, it seems to have less torque but higher chain speed. A battery charge lasts at least as long as a tank of gas. I haven't done timed cuts or anything, these are just my impressions from using both saws in similar applications. In all, I'm pretty happy with it.