blower quits running in a few minutes after putting on of my new 2.0 Ah batteries in it. that got me to wondering what runtime is on BOOST mode. as the manual gives run time for the 2.5 Ah battery only.
I literally ran it for less than 3 minutes using BOOST.
The 530 is rated to run for 22 min on High with the 2.5Ah. If that's the case, the 2Ah has only got 80% of the capacity, so 22 min x 0.8 = 17.6 min.
It's not surprising that the battery would not support Turbo mode once the indicator turned red. My 20" mower loses power once the indicator turns red as well, and does so with both the 2Ah and 4Ah batteries.. If you let it run only on high straight through it might go for a few more minutes.