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Rechargeable lithium-ion battery for the model 4089 Certifier Plus™ Interface Display Module.
4-cell lithium ion rechargeable battery pack (7.2V, 6.4 AHr) provides up to 8 hours of continuous battery operation. The battery pack is charged internally to the device only by plugging the Certifier™ Plus Interface Module into A/C power.
Note: The purchase of a Certifier Plus™ Interface Module 4089 includes a lithium-ion battery pack pre-installed at the factory.