Get ready to supercharge your DIY game with the SKIL 20V Battery and Rapid Charger combo. This dynamic duo packs a punch with its 'Max' (18V) 4.0Ah Lithium-Ion battery that's always ready for action, thanks to its 'Keep Cool™' technology ensuring longer run time and extended lifespan. The 'ActivCell™' feature optimizes power usage, keeping your tools running smoothly without overheating. Need a quick boost? The 'Rapid' charger juices up your 4.0Ah battery by 25% in just 10 minutes, so you can get back to your projects in no time!