BatteryGuy 3 volt 950 mAh replacement battery for Koyo D2-240. Fast nationwide delivery available. It meets or exceeds the Koyo D2-240 PLC specifications defined by the Original Equipment Manufacturer, but at a much lower price. Note this product can also replace: Koyo D2 240, D2 240 Series, Koyo D2240, D2240 Series, D2-240 Series, Koyo D2 240 Series or Koyo D2240 Series... (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. Please be Aware of Online Pirate Companies Who Make Their Own Batteries With Low Grade Materials or Don't Follow US Lithium Battery Shipping Guidelines, Allowing for Possible Internal and Short Circuit Damages Which Can Cause Fire. Chemistry: Lithium / Dimensions: 0.58" Diameter X 1.04" Long / Connector Type: Wire Leads with Connector / Description: 1 Cell Lithium Battery / Works With: Koyo DL230, DL240, D2-230, D2-240 CPU Controllers Shelf Life: Approx. 10 Years / Stable voltage and broad temperature range: (-40° to +80°C)