RAM 9000 Series Hardware Guide 2-38Hardware Installation Revised 2015-07-16BatteryPower Input DiagramBatteryThe battery is used to power the SRAM memory and the real-time clock when the unit does not have main power(at P1 or P2). When needed, replace the battery with a Rayovac BR1225X-BA or a Panasonic BR1225A/BN battery.The battery is located at the rear of at the rear of the unit and is expected to last up to 9 months of the unit beingcontinuously powered down. The battery is not being drained when the unit has power applied to either P1 or P2or both. Under typical operating conditions the battery is estimated to last 5 years or more. However, it is recom-mended to replace the battery every 3 years to ensure no loss of functionality.Rayovac BR1225X-BA* Panasonic BR1225A/BN*Must use this one for ATEXand/or IECeX applications.