61++ (01AV427) 72Wh Extended External Battery for Lenovo ThinkPad T480, T580, T470, T570 & P51s
Unlock truly all-day power for your workhorse ThinkPad. This high-capacity 61++ (01AV427) extended external battery is engineered to provide maximum runtime for your Lenovo ThinkPad T-Series, P51s, and A-Series laptops. With a substantial 72Wh capacity, it’s the perfect upgrade from the standard 24Wh slice battery, ideal for professionals, travelers, and anyone who needs to work untethered for hours on end.
Precision Compatibility & Part Numbers
This is the high-capacity 6-cell extended external battery (often called the “61++” or “72Wh” battery) compatible with the following:
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Compatible ThinkPad Models:
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ThinkPad T Series: T470, T480, T570, T580
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ThinkPad P Series: P51s
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ThinkPad A Series: A475, A485
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Replacement Part Numbers: 01AV427, 01AV423, 01AV425, 01AV422, 01AV492
Key Specifications
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Battery Model: 61++ (6-Cell Extended External Battery)
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Capacity: 72 Wh (High Capacity)
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Voltage: 10.8V / 11.1V
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Type: Li-Ion Battery
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Condition: Brand New, High-Quality Replacement
Why Choose This Extended Battery?
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Massive Runtime Boost: Triple the capacity of the standard 24Wh battery, providing hours of additional unplugged productivity.
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Hot-Swappable Design: Like the standard slice battery, it can be swapped without powering down the laptop, allowing for virtually unlimited runtime with spares.
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Perfect OEM Fit: Precision-engineered to attach securely to the bottom of your compatible ThinkPad without wobble or connection issues.
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Safe & Reliable: Built with advanced protection circuits to ensure safe operation against over-voltage, over-current, and short circuits.
Important Notes
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Extended Size: Please note this is the “61++” extended battery, which protrudes from the bottom of the laptop, adding some thickness and weight compared to the flat 24Wh version.
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Compatibility: This is the external slice battery, not the internal battery. It works in conjunction with your laptop’s internal battery.
Easy to Use
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Power on your ThinkPad.
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Align the connectors and firmly click the 61++ battery into place on the laptop’s base.
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Your system will instantly recognize the new power source and begin utilizing it.
Frequently Asked Questions (FAQ)
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Q: Is this the battery that sticks out the bottom of the T480?
A: Yes. This is the extended 6-cell “61++” battery, which is thicker and provides longer life than the flat 3-cell “61+” version.
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Q: What’s the difference between 01AV427 and 01AV423?
A: These are different part numbers for the same 72Wh extended external battery, often varying by region or production batch. They are functionally identical.
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Q: Will this work with my ThinkPad T490?
A: No. The T490 and newer models discontinued the external slice battery design. This battery is only for the T470/T480/T570/T580/P51s/A475/A485 series.
Ready for Maximum Mobility?
Order your 61++ (01AV427) extended battery today and experience the freedom of all-day battery life.
FAQ: 01AV427 / 01AV423 61++ Replacement Battery for Lenovo ThinkPad T-Series & P51s
Q1: Is this 61++ battery compatible with my ThinkPad?
Yes, this high-capacity 61++ battery is designed for Lenovo ThinkPad models that use the external “Bridge Battery” system. It is compatible with the following laptops and part numbers:
Important: This is the 6-cell, 72Wh external (rear) battery. Your laptop also has an internal battery. Please verify your laptop’s model for a perfect match.
Q2: What are the technical specifications?
This battery meets original Lenovo specifications for the 61++ model:
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Lenovo Part Numbers: 01AV427, 01AV423, 01AV425, 01AV422, 01AV492
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Capacity: 72Wh (Watt-hours)
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Configuration: 6-Cell Lithium-Ion
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Type: High-Capacity External Rear (“Bridge”) Battery
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Design: 61++ (Extends slightly from the rear of the laptop for maximum capacity)
Q3: Is this a genuine Lenovo OEM battery?
This is a high-quality genuine replacement battery manufactured to meet the exact specifications and performance standards of the original Lenovo 61++ battery. It is a brand-new part that guarantees perfect compatibility and safety.
Q4: What is the “Bridge Battery” system?
The compatible ThinkPads feature a unique “Bridge Battery” system:
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Dual Batteries: Your laptop has an internal battery AND this external rear battery.
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Hot-Swappable: You can remove and replace this external battery while the laptop is still running on AC power or the internal battery, without shutting down.
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Extended Runtime: Using both batteries together provides maximum battery life.
Q5: How do I install this battery?
Installation is simple and requires no tools:
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Ensure the laptop is on AC power or has enough charge in its internal battery.
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Slide the battery release latches on the bottom of the battery.
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Insert the new battery into the rear compartment until it clicks into place.
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The laptop and Windows will automatically recognize the new battery.
Q6: What warranty do you offer?
We offer a 12-month warranty on this replacement battery, covering any defects in materials or workmanship.
Q7: Will this work with my ThinkPad if I already have an internal battery?
Yes, absolutely. This external battery is designed to work in conjunction with your laptop’s internal battery. The system will intelligently manage power draw from both to optimize runtime.
Q8: How can I check my battery status in Windows?
Lenovo provides dedicated software for battery management:
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Open Lenovo Vantage or Lenovo Commercial Vantage from the Start Menu.
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Go to the “Power” or “Hardware Settings” section.
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Here you can see the status and health of both your internal and external batteries.
Q9: Why is my old external battery not holding a charge?
Lithium-ion batteries degrade over time and with use (charge cycles). After several years, it is normal for them to lose a significant portion of their original capacity, which is why a replacement is needed to restore the full “Bridge Battery” functionality.
Q10: Why choose this battery over a cheaper alternative?
For a business-grade laptop like a ThinkPad, a quality battery ensures:
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Perfect Compatibility: Guaranteed fit and correct communication with the ThinkPad’s power management system.
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Safety: Meets all required safety standards.
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Reliability: Built with high-quality cells for consistent performance.
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Warranty Support: Backed by a legitimate warranty.
Need Help Confirming Your Model?
Your ThinkPad’s model number is on a label on the bottom of the laptop. Contact us with this number for compatibility confirmation before you purchase!
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