Festool T18 / 498343 Power Tool Battery, 18 Volt 3.0 Ah | Remy Battery
Battery 15v use in an 18v bare tool
BPC 18 Li Battery - Festool BPC 18 Li Battery - Spare Module Type Festool BPC 18 Li Replacement Lithium Ion (Li-Ion) Power Tool Battery – CutRateBatteries.com
Festool 15V 5.2Ah Li-ION 500530 Battery for C15/T15/TI15 - Amazon.com
Amazon.com: Li-ion Battery for Festool C15, PSC/PSBC 400/420, Quadrive T18, Quadrive TSC55, T15, T18 Drill Drivers, T18+3, Ti 15 fits Part No 498343499849 BPC 18 Li : Tools & Home Improvement