Power more across both platforms with less downtime using the RYOBI 18V/40V 4Ah Dual Platform Starter Kit, featuring an 18V ONE+ 4Ah Lithium HIGH PERFORMANCE battery, a 40V 4Ah battery, and a Dual Platform Charger. The batteries feature IntelliCell Electronics, a smarter power and runtime management system that maximizes performance to keep your tools performing at their best, even during demanding use. The COOL-CORE heat management system regulates pack temperature to keep your batteries running cooler while maintaining consistent output during use. The durable battery pack design with anti-vibration technology adds protection against impacts and everyday wear. The included charger is the fastest RYOBI 18V ONE+ charger, charging the included ONE+ battery in as little as 25 minutes. For your 40V batteries, this charger is 4X faster than a standard 40V charger, rapidly charging the 40V 4Ah Battery in 35 minutes. Active cooling reduces charge time while extending the life of your battery, and the Energy Save Mode conserves energy when not charging or maintaining your battery. Best of all, it is part of the RYOBI ONE+ and 40V systems where any battery works with any product within the same platform. This 18V/40V 4Ah Dual Platform Starter Kit is backed by the RYOBI 3-year manufacturer’s warranty and includes an 18V ONE+ 4Ah Lithium HIGH PERFORMANCE Battery, 40V 4Ah Battery, Dual Platform Charger, and operator’s manual.