Cordless battery for power tools cools while recharging

Festool offers Airstream battery technology, which it says can reduce charging times by up to 60 percent. The charging system pulls cooled air through the air intakes of the battery pack and channels airflow through the cells and into the charger, while heat from both the battery and charger are exhausted to the side.

Though the system comprises a newly designed, air-cooled charger and 18-V battery line with up to 6.2-Ah capacity for the company’s line of 18-V power tools and products, the new charger also can charge the existing Li-ion battery packs.