40Y7625 - ThinkPad External Battery Charger

Y7625 ThinkPad External Battery Charger - 40W External Battery Dock For Select ThinkPad Batteries

Description

The 40Y7625 ThinkPad External Battery Charger is a dedicated docking cradle that lets you recharge compatible ThinkPad system batteries outside of the laptop. By charging a spare battery independently, you can keep one battery in use while another charges on the bench, maximizing uptime for mobile users and IT depots. It is designed for select T, R, L, X, Z, SL, Edge and W Series ThinkPad batteries and operates using a standard 65W or 90W ThinkPad AC adapter (sold separately).

Technical Specifications

• Part number: 40Y7625
• Product type: External battery charger / battery dock for ThinkPad system batteries
• Input power: Uses compatible 20V 65W or 90W ThinkPad AC adapter (AC adapter not included)
• Maximum output power: Up to 40W charging power to attached battery
• Supported battery chemistry: Lithium-ion (Li-ion) and lithium-polymer (Li-polymer) ThinkPad smart batteries
• Indicators:
• Charging status LED
• Full-charge LED
• Typical use: Bench-top charging of spare system batteries without docking them into a ThinkPad system
• Approximate dimensions: 6.34 in x 3.58 in x 1.22 in
• Approximate weight: 0.55 lb
• Connection: Direct dock interface for compatible removable system batteries, plus side connector area for supported slice/bay batteries (when applicable)

Interchangeable / Replacement Part Numbers

• 40Y7625

(If you verify additional FRU/ASM numbers from Lenovo service documentation, they can be added here.)

✅ Confirmed Compatibility

Please note that the following list is not exhaustive. Compatibility depends on your system's specific configuration. It’s essential to verify compatibility with your system or enclosure manufacturer prior to installation.

✔️ ThinkPad T Series batteries – selected removable batteries for T60 through T530 era systems that use the classic rear battery connector
✔️ ThinkPad R Series batteries – selected R Series removable system batteries
✔️ ThinkPad L Series batteries – selected L Series removable system batteries
✔️ ThinkPad X Series batteries – selected X Series removable system batteries (excluding specific tablet/slice packs)
✔️ ThinkPad Z Series batteries – selected Z Series removable system batteries
✔️ ThinkPad SL and Edge Series batteries – selected models using the standard ThinkPad system battery connector
✔️ ThinkPad W Series batteries – selected W Series removable system batteries that share the standard connector

(For exact battery FRU-level support, cross-check with Lenovo’s “ThinkPad External Battery Charger (40Y7625) supported batteries” documentation before shipping as a guaranteed match.)

☑️ Key Features

☑️ Allows external charging of spare system batteries without using the laptop
☑️ Supports a wide range of ThinkPad T, R, L, X, Z, SL, Edge and W Series batteries in one compact dock
☑️ Uses the same 65W or 90W AC adapter as many ThinkPad systems for simplified spares management
☑️ Front-panel LEDs clearly indicate charging in progress and full charge status
☑️ Ideal for IT departments, repair centers, and power users who rotate multiple batteries
☑️ Helps increase mobile runtime by keeping a second battery fully charged and ready to swap

⚙️ Fit Notes

• The 40Y7625 is a charger/dock only – a compatible 20V 65W or 90W ThinkPad AC adapter is required and is typically sold separately.
• Designed for standard-form-factor ThinkPad system batteries that use the classic rear battery connector. It is not intended for all tablet/slice or base batteries. Certain batteries (for example, some Tablet 12++/64++ and specific 52+, 67+, 19+ external/slice packs) are not supported even if they fit physically; always check Lenovo’s supported battery list before promising compatibility.
• When installing a battery, ensure the battery rails are fully seated and the contacts are aligned before powering the charger.
• Use on a stable, ventilated surface and avoid covering the charger or battery while charging.
• For mixed fleets, confirm each battery FRU against Lenovo’s official “External Battery Charger 40Y7625” compatibility documentation to avoid unsupported combinations.