Screwdrivers with Li-Ion battery
Li-Ion
— the most advanced variety of those found in modern power tools. Lithium-ion batteries have good capacity with small size and weight, no memory effect and require relatively little time to charge. Their main disadvantage is their high cost; in addition, such batteries are quite sensitive to overheating and hypothermia, and in case of a serious violation of the charge-discharge mode (for example, due to a power controller failure), severe overheating and even fire are possible. However, such "accidents" in fact are extremely rare.Show