45N1112 Laptop Battery Replacement for Lenovo ThinkPad T440 T450 T460

In this review of the 45N1112 replacement battery for Lenovo ThinkPad T4xx and T5xx series, the bottom line is straightforward: it is a practical, low-cost swap for users who need a quick, compatible replacement that installs without fuss. The reviewer found it best suited to technicians and owners who want a direct plug-and-play Li-ion battery replacement that matches the original part numbers, and who value an exact physical fit and immediate functionality over long-term endurance compared with a factory unit.

Key Features

• Model and fit: The 45N1112 is designed as a direct replacement for several Lenovo part numbers, simplifying compatibility checks for T440, T450, T450S, T460 and X2xx models.
• Voltage and capacity: At 11.4V and 24Wh (2060mAh), the battery supplies standard operating voltage and modest capacity appropriate for lightweight daily use.
• Plug & Play design: The battery arrives ready to install and uses the same connector layout as the original, so installation is quick when the back case and cable are matched correctly.
• Compact, black finish: The slim black housing keeps the laptop profile unchanged and maintains the original look when installed.
• Part number coverage: It replaces many OEM codes such as 45N1113, 01AV459, and L16M3P71, which helps owners who find differing part labels in their machines.

Who It's For

This battery is best for Lenovo ThinkPad owners who need an affordable, straightforward replacement that fits the original battery bay and connector. IT technicians, refurbishment shops, and budget-conscious users who prioritize immediate function and correct physical compatibility will appreciate the plug-and-play nature and the multiple matching part numbers.

Users who need extended run-time or long-term heavy-duty endurance should look elsewhere toward higher-capacity or manufacturer-original batteries. Also, anyone uncomfortable opening the laptop back case or identifying the original battery cable should seek professional help to confirm compatibility before purchase.

Pros & Cons

Pros

• Good physical fit and direct compatibility with many Lenovo T440/T450/T460 and X240/X250 series machines.
• Easy to install plug & play design that mirrors original connectors and mounting points.
• Affordable price point that makes it a practical spare or quick replacement option.

Cons

• Mixed reports on long-term battery life; some users experience reduced capacity after months of use.

Specifications

Model	45N1112
Voltage	11.4V
Capacity	24Wh / 2060mAh
Type	Plug & Play Li-ion Battery
Color	Black
Compatible Models	ThinkPad T440, T450, T450S, T460, X240, X240S, X250, X260, A275
Replacement Part Numbers	45N1112, 45N1113, 01AV459, L16M3P71, 45N1110

Our Verdict

The 45N1112 replacement battery is a sensible, cost-effective choice for users who need a correct-fit, plug-and-play battery for older ThinkPad T4xx/T5xx and X2xx machines. It provides immediate functionality and covers many OEM part numbers, making it good value for repairs and quick swaps, but buyers who prioritize maximum run-time or long-term cycle life should consider higher-capacity options or OEM units.

Frequently Asked Questions

How do I confirm this battery fits my laptop?
Open the laptop back case and check the model number on your original battery cable; match it to the listed part numbers such as 45N1112 or 01AV459.

Do I need to disconnect power before installing?
Yes, always disconnect the laptop power cord and power down the machine before removing the old battery and installing the replacement.

Will this improve my laptop run-time?
This battery restores basic run-time to match its 24Wh capacity, but long-term endurance is mixed versus OEM batteries, so expect functionality rather than extended battery life.