Chris, I think I see what you're talking about in the manual and I will bring this to Germany's attention to get it corrected. Our manuals are printed there and I'm sure it was a simple oversight in the language of the warranty section of the manual.
Here's the official statement you're looking for: we warranty the Lithium Ion batteries for 3 years, some conditions apply.
I know that's not terribly reassuring in lieu of the misprint in the manual. The catalog does state that the 3-year warranty covers the batteries on page 118 and there's no exclusion of batteries in the back of the catalog in the warranty text.http://drills.festoolusa.com/cordless-drills/features/battery-technology/
If you call the service department, I will guarantee you that they will assist you with a warranty repair/replacement of your batteries.
Here's the section of the T-drill manual about the warranty.
Edit: Thanks for bringing this to our attention, Chris. Christian is contacting Germany to get this corrected now.
Festool Limited Warranty
This warranty is valid on the pre-condition that the tool is used and operated in compliance with the Festool operating instructions. Festool warrants, only to the original consumer purchaser, that the specified tool will be free from defects in materials and workmanship for a term of one year from the date of procurement. Festool makes no other warranty, express or implied, for Festool portable power tools. No agent, representative, distributor, dealer or employee of Festool has the authority to increase or otherwise change the obligations or limitations of this warranty. The obligations of Festool in its sole discretion under this warranty shall be limited to the repair or replacement of any Festool portable power tool that is found to be defective as packaged with the User Manual. Excluded from coverage under this warranty are: normal wear and tear; damages caused by misuse, abuse or neglect; damage caused by anything other than defects in material and workmanship.
This warranty does not apply to accessory items such as circular saw blades, drill bits, router bits, jigsaw blades, sanding belts, and grinding wheels. Also excluded are “wearing parts”, such as carbon brushes, lamellas of air tools, rubber collars and seals, sanding discs and pads, and batteries. Festool portable power tools requiring replacement or repair are to be returned with the receipt of purchase to Festool (call 800-554-8741 for address details). IN NO EVENT SHALL FESTOOL BE LIABLE FOR ANY CONSEQUENTIAL OR INCIDENTAL DAMAGES FOR BREACH OF THIS OR ANY OTHER WARRANTY, EXPRESSED OR IMPLIED WHATSOEVER. ALL WARRANTIES IMPLIED BY STATE LAW, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE HEREBY LIMITED TO THE DURATION OF THREE YEARS.
Some states in the U.S. and some Canadian provinces do not allow the limitations on how long an implied warranty lasts, so the above limitation may not apply to you. With the exception of any warranties implied by state or province law as hereby limited, the foregoing express limited warranty is exclusive and in lieu of all other warranties, guarantees, agreements and similar obligations of Festool. This warranty gives you specific legal rights and you may also have other rights which vary from state to state in the U.S. and province to province in Canada.