68+ 45N1128 X240 Battery Compatible with ThinkPad Series - Long

In this review the 68+ 45N1128 X240 battery is examined for owners of older ThinkPad laptops who need a reliable replacement. The bottom line: it is a straightforward, 6-cell Li-ion pack that delivers solid value for users who want a near-OEM fit and modern protection circuits. Our review finds it best for professionals and students using T440/T450/X250 series machines who value safety features and a 48Wh capacity rather than ultralong runtime; installation is easy and the unit aims to match original fit and performance.

Key Features

• Compatibility: Designed to replace many ThinkPad part numbers including 45N1124 through 45N1137, making it an easy swap for a wide range of T440, T450 and X240 series laptops.
• Battery chemistry: The Li-ion construction with six cells provides a balanced weight and energy density for portable work without adding bulk.
• Capacity and voltage: A 48Wh capacity at 10.8V gives dependable power for typical office tasks and light media use between charges.
• Protection circuits: Built-in overcharge, overdischarge, overcurrent and temperature control help protect the laptop and extend battery life compared with unprotected packs.
• Durability: Rated for up to 500 recharge cycles, this pack targets multi-year use for users who do moderate daily charging.
• Support and warranty: Includes a 30-day refund policy and a 12-month warranty with seller support for any defects or fit issues.

Who It's For

This battery is a good match for owners of ThinkPad models in the X240, T440, T450, T460 and similar families who need a direct replacement that fits correctly and provides safe charging behavior. It is aimed at people who prioritize compatibility, a sensible 48Wh capacity and built-in protections rather than pushing for the absolute longest runtime.

Users who depend on 8+ hours of heavy use for video editing or gaming should consider higher-capacity or newer battery options instead, since this pack best suits everyday office tasks, email, browsing and light media on compatible older ThinkPad models.

Pros & Cons

Pros

• Good fit and straightforward installation for listed ThinkPad models, matching many OEM part numbers.
• Built-in safety features like overcharge and temperature protection add reliability and peace of mind.
• Solid value: customers report the battery quality and functionality are comparable to the original for typical tasks.

Cons

• Runtime is moderate at 48Wh; some users reported mixed endurance results with a few units not holding charge as expected.

Specifications

Battery type	Li-ion
Voltage	10.8V
Capacity	48Wh
Cells	6 cell
Recharge cycles	Up to 500 cycles
Compatible part numbers	45N1124, 45N1125, 45N1126, 45N1127, 45N1128, 0C52861, 0C52862

Our Verdict

The 68+ 45N1128 X240 replacement battery is a practical, value-focused option for owners of older ThinkPad models who need a safe, properly fitting pack with decent longevity. It is recommended for everyday productivity users who want a reliable replacement with protection circuits and a one-year warranty, but those who need maximal run time should consider higher-capacity alternatives.

Frequently Asked Questions

Will this battery fit my ThinkPad T450?
Yes, the pack is listed as compatible with the T450 and many related models when the part numbers match; use the provided compatible part list to confirm fit.

How long will the battery last before replacement?
It is rated for up to 500 recharge cycles, which for typical daily use translates to multiple years, though actual lifespan depends on usage and charging habits.

Does it include protection circuits?
Yes, the battery has overcharge, overdischarge, overcurrent and temperature protection to improve safety and reliability.