This Power X-Change Battery starter set contains a Power X-Change Plus battery and a Power X-Change Boost charger, making it ideal for use with more demanding applications. The battery can be used with any tool in the 18v Power X-Change system. Thanks to Multi-Ah technology, the battery in this kit can be operated as a 6ah battery for maximum runtime and as a 4ah battery for a 3x longer total service life. The latest generation of lithium-ion cells provide 100% more power for maximum performance in all applications. These batteries can also be doubled up for twin pack use in 36v Power X-Change tools. The 6A Power X-Change Boost charger is currently the fastest charger available in the Power X-Change system. The charge times for batteries can be significantly shortened by a switchable boost mode which delivers 50% faster charging times and therefore enables batteries to be ready for use again in a much shorter time. The battery included with this starter set can be fully recharged withi