Batteries

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This page gives an overview over the different types of system batteries found in ThinkPads.

UltraBay batteries are listed in the UltraBay Devices overview.

For advice on battery treatment, see Maintenance.

See also Lenovo's Batteries and Battery Chargers - Reference guide.

Clock/CMOS Battery

CR2025

There is a CR2025 with a two-lead cable on it under the lid with the SDRAM-Slots beneath it. It´s hardly visible, but you can plug out the cable and softly pull on it. Also on 600E, and probably X and D, too. Hardly neccesary to replace, as it keeps good for nearly ten years, but that´s the age of the 600 series now (2010).

CR1220

Fits right in a socket, no cable assy on solder tabs. FRU 11J8591.

Battery technologies

NiCd

NiMH

LiIon

Types of Batteries featured in ThinkPads

Standard AA batteries

NiCd Battery

NiMH Battery

Stupid (controller-less battery packs)

Smart (packs with embedded microcontroller)

LiIon Battery

Stupid (controller-less battery packs)

Smart (packs with embedded microcontroller)

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