Ryobi RC18150-250 Battery Set with Charger (18 V, 2 x 5 Ah Batteries, Charging Time, 60 Minutes, Charge Indicator, 3 x More Runtime) : Amazon.de: DIY & Tools
Ryobi 18-Volt Cordless Reciprocating Saw Kit with a 4Ah Battery and Charger (No Retail Packaging, Bulk Packaged) - - Amazon.com
Ryobi ONE+ 18V 5.0AH Lithium+ Battery Introduction video - YouTube