GHU 73Wh Replacement Battery for Lenovo ThinkPad

GHU's 73Wh replacement battery restores reliable, long-lasting power to compatible Lenovo/IBM ThinkPad models including T400, R400, T61 and R61 series.

If your ThinkPad runs down before the workday is over, this GHU 73Wh battery offers a direct-fit swap for numerous OEM part numbers (42T5264, 42T5265, 42T5230, 41U3196, 41U3197, 41U3198, 42T4644, 42T4531, 42T4532, 42T4552, 42T4677). Built to replace the original pack inside older Lenovo T400, R400, T61 (wide-screen) and R61 machines, it balances runtime, cycle life and safety testing to get your laptop back to dependable portable use.

How long will this GHU battery keep my ThinkPad running?

Runtime depends on your laptop’s workload and age, but the 73Wh capacity typically provides several hours of use under normal productivity tasks. Expect longer runtimes than smaller OEM replacements, and a practical cycle life for everyday use.

• 73 watt-hour capacity for extended on-battery time
• Designed to support typical office tasks, web browsing, and light media playback
• Rated for 500+ charge cycles with proper care

Will this pack physically and electronically fit my model and connectors?

Yes — GHU manufactures this pack to match the original form factor, terminal layout and mounting points for the listed Lenovo part numbers and ThinkPad models. It installs the same way as the factory battery and communicates with the laptop's battery management system.

• Compatible with Lenovo/IBM ThinkPad T400, R400, T61 (wide), R61 and listed part numbers
• OEM-style contacts and locking notches for a secure fit
• Plug-and-play replacement: no special drivers required

Is the GHU replacement battery safe and durable?

GHU vettes batteries through standard safety and quality checks to reduce risk and improve longevity. The pack is built with protective electronics to prevent overcharge, short circuits and thermal issues during normal use.

• Manufactured to meet CE, FCC and UL test standards
• Integrated protection circuitry for over-current, over-voltage and short-circuit situations
• High-quality cells selected for consistent discharge and charge behavior

How do I maximize the lifespan of this Lenovo replacement battery?

Simple habits extend battery life: avoid extreme temperatures, store partially charged if unused for months, and complete regular charge cycles rather than keeping it constantly at 100%. These steps preserve capacity and maintain steady performance over many cycles.

• Operate between 10–35°C for best longevity
• Store at roughly 40–60% charge for long-term storage
• Perform full discharge/charge cycles occasionally to recalibrate battery gauge

Who is this for? The GHU 73Wh replacement battery is aimed at owners of legacy Lenovo and IBM ThinkPad T400, R400, T61 (wide-screen) and R61 laptops who need a cost-effective, high-capacity swap for a worn or failing pack. It's ideal for remote workers, technicians maintaining older fleet machines, students using vintage ThinkPads, and anyone who prefers extending the useful life of a trusted laptop without upgrading hardware. Note: this is a third-party replacement designed to match original specifications; follow your laptop manufacturer's installation guidance and safety recommendations when replacing the battery.