The Festool 500243 Replacement Battery for CXS, 10.8 V, 2.6Ah Lithium Ion is a lithium-ion battery pack made for select Festool compact drills. This is a battery pack designed for powering Festool CXS and TXS cordless drilling and fastening work. Model Number: 500243. If you are still running an original CXS or TXS and want a fresh battery with useful runtime in a small package, this is the correct type of replacement.

The core story here is simple: compact drill users usually care about balance just as much as runtime. Festool rates this battery at 10.8 V and 2.6 Ah, which gives the tool enough stored power for day-to-day drilling, hardware installation, cabinet work, electrical trim-out, punch-list tasks, and other light fastening jobs without adding unnecessary bulk. At just 0.44 lbs, it keeps the drill feeling like the compact tool it was meant to be.

Festool also calls out the practical benefits of lithium-ion chemistry. You get a battery that is easy to store, ready to use, and not saddled with the old maintenance habits tied to older battery types. There is virtually no memory effect, and scheduled cycling is not required to help preserve battery life. For users who grab a compact drill for short service calls or quick install work, that matters more than flashy spec-sheet language.

From a jobsite standpoint, fast turnaround matters too. ACME lists a 45-minute recharge time, which means this battery can get back in service quickly when paired with the proper charger. If you keep one on the tool and one on the charger, that short charge window makes the original CXS or TXS platform a lot easier to live with for repeated stop-and-go tasks.

Compatibility is the key buying detail. This battery is listed for the Festool CXS and TXS cordless drills, and Festool specifically notes that it is not for CXS/TXS 12 and CXS/TXS 18. That distinction is important because the older compact drill platform and the newer 12V and 18V versions do not use the same battery setup. If you need a direct replacement for an original CXS or TXS battery, this is the fit you want. If you own a 12V or 18V version, keep looking.

Who should buy it? Anyone already invested in an original Festool CXS or TXS compact drill who wants to keep that tool working the way it should. This is especially useful for installers, finish carpenters, service techs, and serious DIY users who rely on a compact drill for controlled drilling and fastening in tight spots. It is not a flashy upgrade product. It is the practical replacement that keeps a very useful compact Festool drill platform alive and ready to work.

Festool 500243 Replacement Battery for CXS, 10.8 V, 2.6Ah Lithium Ion Keeps a Good Compact Drill Worth Using

If you own the original CXS or TXS, this is the kind of replacement battery that makes more sense than replacing the whole drill.

• Who it's for: Users of original Festool CXS and TXS compact drills who need a fresh battery for drilling, hardware install, and light fastening work.
• Why it stands out: It gives you 2.6 Ah capacity in a lightweight package, charges quickly, and keeps the compact feel that makes these drills so useful.
• Worth knowing: The fitment note matters here. This battery is not for CXS/TXS 12 or 18 models, and the charger is not included.

• What tools does this battery fit? It is listed for Festool CXS and TXS cordless drills.
• Will it fit CXS/TXS 12 or CXS/TXS 18 drills? No. Festool specifically states that it is not for CXS/TXS 12 and CXS/TXS 18 models.
• How long does it take to recharge? ACME lists a recharge time of 45 minutes.
• Is a charger included? No. Charger included is listed as No.