BatteryGuy 3.6 volt 3600 mAh replacement battery for VM-D900 Series Robot (controller memory battery). Fast nationwide delivery available. It meets or exceeds the VM-D900 Series Robot (controller memory battery) PLC specifications defined by the Original Equipment Manufacturer, but at a much lower price. Note this product can also replace: VM D900 Series Robot (controller memory battery) or VMD900 Series Robot (controller memory battery)...(This is one Battery - Please verify quantity needed for your application before ordering) BatteryGuy PLC and Industrial Computer Batteries are Manufactured to Meet or Exceed the Quality of the Original Equipment Manufacturer. Only the Highest Grade of Materials are Used to Manufacture our Batteries, with Safety and Performance in Mind. Chemistry: Lithium Dimensions: 0.67" Diameter x 2.00" High Connector Type: Wire Leads Connector Description: 1 Cell Lithium Battery Works With: series industrial programmable logic controls Shelf Life: Approx. 10 Years Stable voltage and broad temperature range: (-60° to +85°C)