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.

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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)