RYOBI introduces the 18-Volt ONE+ 4.0 Ah LITHIUM+ Battery and 18-Volt Dual Chemistry Charger Kit. This RYOBI ONE+ 4.0 Ah LITHIUM+ Battery improves the performance of every RYOBI 18-Volt ONE+ power tool. The 4.0 Ah LITHIUM+ Battery provides superior runtime, power, and performance. Its lightweight composition results in less user fatigue, and it has a built-in 4-bar illuminated charge indicator to warn the user of diminishing capacity. The dual chemistry charger features RYOBI’s patented IntelliPort Technology which protects battery cells, maximizes battery life, and conserves energy so well that it earned an ENERGY STAR rating.