Will this fit a lenovo thinkpad t400

No idea. Mine was a T61 and it was perfect. If you look at the detail section, it tells you the models it fits. There are a lot of different ones.

How good of a battery is this?

this battery is a high capacity battery with 57 Wh inside, it can last more than 3 hours.

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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GHU New Battery 57 Wh for 33+ 41U3198 43R2499 42T4531 Compatible with Lenovo Thinkpad T61 R61 R61i 14-Inch Widescreen R400 T400 42T5263 42T5229 42T5227 42T4677 42T5265 42T4552 42T5228 42T4530

Product ID: 105707532

Details

Battery Capacity
5100
Battery Cell Composition
Lithium Ion
Brand
GHU
Number of Batteries
1 Lithium Ion
Recommended Uses For Product
Compatible

⚡5100 mAh high power

💼Compatible with Lenovo Thinkpad pro models

🔋57 Wh capacity

46290CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Power your Lenovo like a pro — never miss a beat!

LIGHTWEIGHT PORTABLE - At just 10.6 ounces, it keeps your laptop light without sacrificing power.
PEACE OF MIND WARRANTY - Backed by a 1-year warranty to keep your workflow worry-free.
RELIABLE RECHARGEABILITY - Rechargeable lithium-ion cells ensure consistent performance and durability.
POWER THROUGH YOUR WORKDAY - 57 Wh lithium-ion battery delivers long-lasting energy for uninterrupted productivity.
SEAMLESS LENOVO COMPATIBILITY - Perfectly engineered for Lenovo Thinkpad T61, R61, R61i, T400, and R400 widescreen laptops.

The GHU New Battery 57 Wh (5100mAh) is a rechargeable lithium-ion replacement battery designed specifically for Lenovo Thinkpad widescreen laptops including T61, R61, R61i, T400, and R400 models. Lightweight at 10.6 ounces and delivering 10.8 volts, it ensures extended laptop usage with reliable performance, backed by a 1-year warranty.

Specifications

ASIN	B07JLM13LY
Antenna Location	Compatible with Lenovo Thinkpad R400 T400 14-inch
Battery Capacity	5100 milliamp_hours
Battery Cell Type	Lithium Ion
Battery Weight	10.5 ounces
Best Sellers Rank	#8,543 in Computers & Accessories ( See Top 100 in Computers & Accessories ) #384 in Laptop Batteries
Brand	GHU
Compatible Phone Models	Compatible With Lenovo Thinkpad T61 R61 R61i 14-Inch Widescreen R400 T400
Customer Reviews	4.2 4.2 out of 5 stars (50)
Item Dimensions	8 x 2 x 0.75 inches
Item Type Name	laptop-computer-batteries
Item Weight	10.6 ounces
Manufacturer	GHU
Model Name	42T4677
Model Number	LN06
Number of Batteries	1 Lithium Ion batteries required. (included)
Reusability	Rechargeable
UPC	602318727473
Unit Count	1 Count
Voltage	10.8 volts_of_direct_current
Warranty Description	1 year

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