Serial Ultrabay Slim Battery II

Advanced Ultrabay Battery III or ThinkPad Battery 42 This is a battery pack that slides into a Serial Ultrabay Slim, Ultrabay Slim or Enhanced with power interfacing pins. Features Battery specification: 2.9Ah, 10.8V, 31.32Wh Battery cell count: Three, 3.6V lithium-ion polymer prismatic cell Battery run time: up to 2.5 hours Battery charge time: up to 5 hours Weight: 235 grams or 0.52 pounds

Part numbers

Branded as the Advanced Ultrabay Battery III

• 45K1749, 57Y4536

Branded as the ThinkPad Battery 42

• 51J0508, 51J0507

Usage and Linux support

See How to use Ultrabay batteries.

Models supporting this accessory

• W500
• T60, T60p, T61, T61p, T400, T400s, T410s, T410si, T420s, T420si, T500
• R60, R60i, R61, R61i, R400, R500
• Z60t, Z61t, Z60m, Z61m, Z61p
• UltraBase X6
• UltraBase X6 Tablet