Ultrabay Slim Battery II

Ultrabay Slim Battery II (40Y6789) This is a battery pack that slides into an Ultrabay Slim or Enhanced with power interfacing pins. Features Battery specification: 2.7Ah, 10.8V, 29.16Wh Battery cell count: Three, 3.6V lithium-ion polymer prismatic cell Battery run time: up to 2.3 hours Battery charge time: up to 4.6 hours Weight: 235 grams or 0.52 pounds FOOTNOTES [Δ] This battery pack cannot be used in T4x/R5x models as they have a different battery pin layout. This battery pack cannot be used in a W500, T400, T400s, T410s, T410si, T420s, T420si, T500, R400, and the R500, as it has a different 'ejecting' design to allow it to be ejected differently. Despite the differences in design, the battery terminals are oddly the same.

Part numbers

Branded as the Advanced Ultrabay Battery, Sony

• 41U4890 (40Y6787), 40Y6790 (40Y6787)

Usage and Linux support

See How to use Ultrabay batteries.

Models supporting this accessory

• T60, T60p, T61, T61p
• R60, R60i, R61, R61i
• Z60t, Z61t, Z60m, Z61m, Z61p
• ThinkPad X6 UltraBase, ThinkPad X6 Tablet UltraBase