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Anyway, I rotate between the two every other week cutting two different lawns. Lately, I've noticed one of them didn't seem to last nearly as long as the other, so I ran a benchmark test this afternoon to find out which one was the problematic battery.
- Both batteries depleted and fully charged.
- 21" SP mower, set to run with a bungee chord engaging the blade, sitting parked. No load - just running and sitting still.
- Kept units in shade during test. It's about 82F today.
1 hour, 25 minutes - low battery light comes on
1 hour, 30 minutes - mower shut down. Battery depleted.
1 hour, 2 minutes - low battery light comes on
1 hour, 10 minutes - mower shuts down. Battery depleted.
This is quite a difference in performance. I'm submitting a warranty claim; will advise how my experience goes in this thread. Wish me luck! :/