BatteryGuy 3.6 volt 2600 mAh replacement battery for Maxell ER6-WK11. Fast nationwide delivery available. It meets or exceeds the Maxell ER6-WK11 PLC specifications defined by the Original Equipment Manufacturer, but at a much lower price. Note this product can also replace: Maxel ER6 WK11, Maxel ER6WK11, Maxel ER6-WK11, Maxell ER6 WK11 or Maxell ER6WK11... (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: 0.62" Diameter X 2.02" Long / Connector Type: Wire Leads with Connector / Description: 1 cell Lithium Battery / Works With: Mitsubishi CR1, CR2, CR2A, CR3, M500, M600 series robot contollers Shelf Life: Approx. 10 Years / Stable voltage and broad temperature range: (-60° to +85°C)