Amazon.com: Festool - High Power 4.0AH Battery Pack with Airstream and Bluetooth : Tools & Home Improvement
Festool PHC 18 Mobile Phone Charger For 18V Li-Ion Battery Pack 577155 from Festool - Acme Tools
Synergy Digital Power Tool Battery, Compatible with Festool BPS15.6 Power Tool, (Ni-MH, 15.6V, 2100mAh) Ultra High Capacity, Replacement for Festool 491 823, 492 269, 6S, BPS15, BPS15.6 Battery - Walmart.com
Festool 577108 Energy Set 18V batteries and DUO Charger