01AV491 Battery for Lenovo ThinkPad T470 T480 T570 T580 P51s P52s | 10.8V 48Wh 4400mAh

Detailed Product Specifications and Features:

Core Technical Parameters:

 

Property	Specification
Model Numbers	01AV491 (ThinkPad 61+) / 01AV425 / 01AV426
Battery Type	Li-ion (Grade A+ Extended-Capacity Cells)
Voltage	10.8V (Compatible with 11.1V / 11.4V)
Capacity	4400mAh / 48Wh (Extended-Capacity Mid-Size)
Cells	6-Cell
Condition	100% Brand New from Factory
Life Cycle	Up to 1000 recharge cycles
Multiple Protection	Over Current, Over Voltage, Over Charge & Discharge, Overheat, Short Circuit, ESD, EMI
Color	Black
Certifications	UL2054, CE, FCC, RoHS, UN38.3, MSDS, IEC62133
OEM/ODM	Yes(Accepted)
Warranty	18 Months After Sales, 24/7 Email Support.
Product Dimensions	16.14 x 4.92 x 1.57 inches
Item Weight	1.76 ounces

 

Technical Note:

Design Note: The 01AV491 (ThinkPad 61+) is an External Rear battery that supports Lenovo’s “Power Bridge” technology.
Physical Note: As a 48Wh 6-cell pack, this battery is physically slightly thicker than the flush-mount 24Wh battery. It provides a subtle lift to the rear of your ThinkPad, which improves typing comfort and allows for better cooling airflow under the chassis.

Product Features:

• Battery Newest Premium Grade Cells
• Best Circuit Board
• Multiple command chip control, keep the battery stable charge and discharge;
• Over-charger protection and discharger protection, short-circuit protection, ensure fast charges and low power consumption
• Easy & Quick Installation
• Our battery is 100% compatible with the original battery and meets
• CE/FCC/ROHS/UL-certified standards. It is 100% new from the manufacturer and can support up to 1000 recharge cycles over the life of the battery
• Power Interface: Gold-plated connector points to ensure current transport excellently and serve stably.
• Enclosure: The enclosure is made of ABS + PC high-quality material, which has a high-temperature-resistant function to protect your laptop from overheating
• Battery Buckle: The battery buckle is closely connected to the laptop, and the metal interface is stably powered

01AV491 (ThinkPad 61+) / 01AV425 / 01AV426 Battery Compatibility Laptop Model List:

Series	Specific Laptop Models & Machine Type-Models (MTM)
ThinkPad T Series	ThinkPad T470: (Type 20HD, 20HE, 20JM, 20JN) ThinkPad T480: (Type 20L5, 20L6) ThinkPad T570: (Type 20H9, 20HA, 20JW, 20JX) ThinkPad T580: (Type 20L9, 20LA)
ThinkPad P Series	ThinkPad P51s: (Type 20HB, 20HC, 20JY, 20JZ) ThinkPad P52s: (Type 20LB, 20LC)
ThinkPad A Series	ThinkPad A475: (Type 20KL, 20KM) ThinkPad A485: (Type 20MU, 20MV)
Special Editions	ThinkPad TP25: (25th Anniversary Edition Type 20K7)
Common MTM Suffixes	20L50000US, 20L5004RUS, 20L5000VUS, 20HD0001US, 20H9003XUS, 20LA0006US, 20LB0002US, 20L6CTO1WW, 20HDCTO1WW

 

01AV491 (ThinkPad 61+) / 01AV425 / 01AV426 Battery Compatible P/N (Part Numbers) List (P/N & FRUs):

Identification Type	Full List of Compatible Numbers
FRU Part Numbers	01AV491, 01AV425, 01AV426, 01AV422, 01AV423, 01AV424, 01AV427, 01AV428, 01AV452, 01AV490, 01AV492
ASM Part Numbers	SB10K97582, SB10K97583, SB10K97579, SB10K97580, SB10K97581, SB10K97584, SB10K97585, SB10K97597
Marketing P/N	ThinkPad 61+ (48Wh), ThinkPad 61 (24Wh), ThinkPad 61++ (72Wh)
System/Option P/N	4X50M08811, 4X50M08810, 4X50M08812
Factory / ID Codes	121500047, 121500049, 121500052, 121500053, 31046285

 

Why Choose HTJ 01AV491 48Wh Battery?

• Double the Runtime (48Wh vs 24Wh):
  The standard “61” battery, often pre-installed in these units, only provides 24Wh. The HTJ 01AV491 (61+) effectively doubles your external capacity to 48Wh, providing a total system endurance that easily handles full work shifts without needing an AC outlet.
• Seamless Power Bridge Integration:
  Our 01AV491 is fully compatible with Lenovo’s hot-swap logic. It acts as “Battery 2,” draining first so that you can swap it for a fresh pack while the internal “Battery 1” keeps the system running.
• Grade A+ Cells for Longevity:
  HTJ utilizes premium Li-ion cells to ensure high cycle stability. Unlike cheap generic alternatives that lose capacity after 3 months, our cells maintain a high voltage plateau, ensuring your T480/T470 doesn’t experience sudden shutdowns under high CPU loads.
• Premium 18-Month Warranty:
  Every HTJ battery undergoes multiple stages of factory testing, including 48-hour aging and high-current discharge validation. We back this quality with a market-leading 18-month warranty.

How to Install Your New 01AV491 Battery？

Replacing the external 01AV491 (61+) battery is a simple, tool-free process using Lenovo’s dual-latch system.

⚠️ Crucial Safety Preparation

• Hot-Swap Support: If your ThinkPad has a functional internal battery, you do NOT need to power off the laptop.
• Surface: Place the laptop upside down on a soft, clean surface to avoid scratching the lid.

01AV491 Battery Step-by-Step Installation Guide：

1. Locate the Dual Latches: Find the two sliding latches on the bottom rear of the laptop.
2. Unlock the Manual Latch: Slide the right-side latch to the “Unlocked” position (usually indicated by a red icon).
3. Release the Spring Latch: Slide and hold the left-side spring-loaded latch.
4. Remove the Old Battery: While holding the release latch, pull the old battery away from the chassis.
5. Insert the HTJ Battery: Align the guide rails of the new HTJ 01AV491 battery and slide it into the bay until it clicks firmly into place.
6. Secure the Lock: Important: Slide the manual lock latch back to the “Locked” position to ensure the battery is secured.
7. Verification: Open Lenovo Vantage or Windows Battery settings. Ensure “Battery 2” is detected and status shows as “Charging” or “Healthy.”

💡 Pro Tip:

To maximize the lifespan of your new 48Wh cells, use the “Battery Charge Threshold” feature in Lenovo Vantage. Setting your battery to stop charging at 80% is ideal for users who frequently use their ThinkPad while connected to a docking station or AC adapter.

FAQ (Frequently Asked Questions)

Q: Can I use this 48Wh battery if my original was the flat 24Wh version?
A: Yes, absolutely. It uses the same connector. The only difference is that this battery will protrude slightly from the bottom, providing a better typing angle.

Q: Does this battery fit the ThinkPad T480s?
A: No. The “s” models (like T470s, T480s) use internal-only batteries. This 01AV491 is exclusively for the standard T470, T480, T570, T580, P51s, and P52s.

 

Laptop Maintenance Tips:

1. New battery: For using a new battery, you’d better try a few cycles of discharging to 5%. then charging up to 95%. So that it can be activated completely
2. Overuse: Do not always run a battery to 0%, as this would reduce its usage life.
3. Charging sequence: When charging, first install the battery, then turn on the power. When fully charged, first cut off the power, then pull the power plug.
4. Long-term storage: Please store the unused battery fully charged. (Charge it once a month.) Do not store at low power to prevent reducing the lifespan of a battery
5. Charger: Do not replace the laptop adapter casually. If the original adapter cannot be applied due to malfunction or damage, please replace the models so as not to reduce the service life of the battery due to incompatibility.

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