In total, it turned out to sort out this battery for a more powerful one. The battery has 10 batteries connected in series. But there is room for 10 more batteries. Which filled up quickly. I ordered powerful high-current 30A batteries in China. Price 3600r for 20 pcs. quality batteries. They write that their capacity is 3000 mah. But actually 2500-2800. In total, it turned out roughly 5000mah 40v battery. Enough to mow for about 30-45 minutes at maximum speed. It mows both grass and nettles and small shrubs such as wormwood or ragweed, and even a young American maple. This battery To work without fanaticism. Charges in about 2.5 hours. It heats up more during mowing than during charging. I took a scythe for mowing in places where I am too lazy to pull an extension cord. Bought and sorted out 2 batteries. the replaced batteries went to the powerbank for 20 batteries. Just like that, it all came out. But on the native 2Ah, mowing 15 minutes is very little. If only near your garage or a small plot of about a hundred square meters.