February 3, 2009 - Rayovac announced that the 840 has been discontinued and will no longer be produced beyond June 2009. Epower2go will continue to sell existing stocks until they are gone. After that time, we will provide a form and function equivalent.

Apple part number: 922-0750. The Rayovac 840 is a 4.5 Volt 650 mAh alkaline computer clock CMOS PRAM battery with a 7 inch wire harness Berg-type connector and Velcro fastener. Note - the Rayovac 840 is now made using machine assembled cases. The manufacturer logo and identifying markings are embossed onto a solid plastic case. Older Rayovac 840 batteries use a paper label and have not been manufactured since 1997. The Rayovac 840 battery replaced the Rayovac 841 battery (3 inch wire harness in 2003 and can be used to replace the Rayovac 844 battery (same Voltage but lower capacity).

The Rayovac 840 battery is typically used in Macintosh Performa desktop systems plus the clones made by Motorola (StarMax and UMax) as a PRAM retention battery.

Many types of IBM desktop systems including those made by Hewlett-Packard, Compaq and Dell use the Rayovac 840 battery to maintain the computer clock and CMOS RAM information.

Note: Alkaline clock batteries including the Rayovac 840 can be shipped interstate via UPS ground or air services plus USPS Priority Mail. 

Apple part number: 742-0011. The Tadiran TL5101/S inorganic Lithium is the specified replacement part for early Apple Macintosh systems. Please contact our sales department for pricing over 100 units.

SPECIAL NOTE - Lithium primary batteries MUST be shipped with special labels and CANNOT be transported on passenger aircraft. The US penalty is $18,000 per violation. As a result, all US shipments of Lithium primary batteries are transported by UPS. International shipments are sent via DHL. We provide Material Safety Data Sheets (MSDS) where required.

Apple part number: 922-1262. The Tadiran TL2150 high-current inorganic Lithium (and later version TL5902) is the specified replacement part for Apple Macintosh systems beginning with the Power Macintosh 6100 and some Mac-clones. Don’t be fooled by less expensive batteries! These batteries are specifically engineered for the Macintosh "SoftKey" circuit and provide extra-long life. Contact our sales department for pricing over 100 units.

The PC133A is a 4.5 Volt alkaline "A" cell battery. This product is used in Mac 128K, 512K, 512Ke, and Mac Plus systems.

Note: Alkaline clock batteries including the Rayovac 840 can be shipped interstate via UPS ground or air services plus USPS Priority Mail.