Elevate your DIY game with the Skil 20V 4.0AH Li-Ion Battery - a powerhouse of energy that keeps your tools revved up and ready for action. This battery boasts cutting-edge technology like the 'Keep Cool' feature, extending your runtime by 25% and doubling battery life, perfect for those long Caribbean projects under the sun. With the 'ActivCell' technology, you get optimal performance and protection, ensuring your tools are always at their best. Plus, the handy battery level indicator lets you know when it's time for a recharge, so you're never caught off guard in the middle of a job.