Got pros: I have been using this device for 5 years now. Never failed. The power is great, it spins very well. Bought a second one for a worker. The rotation does not weaken, as long as there is at least some charge in the battery - it rotates stably. The charge is enough for about 2 hours, if you turn the self-tapping screws without stopping, that is, to give a load. The second battery has time to charge while the first one is working - there is no downtime in work. Cons below: In the cold, the capacity of the batteries drops - but this is the misfortune of all lithium batteries.
You can now see some pictures to accompany my review and enhance your understanding.