Lenovo 01AV421 Replacement Battery
- Brand:
- Lenovo
- Capacity Wh:
- 24 Wh
- Nominal Voltage:
- 11.46 V
Quick facts
01AV421 is a battery that fits 5 laptop models: Lenovo ThinkPad T470 (20HD, 20HE, 20JM, 20JN), ThinkPad T480 (20L5, 20L6), ThinkPad A475, ThinkPad A485, ThinkPad 25. It is also sold as 01AV419, 01AV420, 01AV489, SB10K97576, SB10K97577, SB10K97578.
| Part number | 01AV421 |
|---|---|
| Part type | Battery |
| Also sold as | 01AV419, 01AV420, 01AV489, SB10K97576, SB10K97577, SB10K97578 |
| Capacity | 24 Wh |
| Voltage | 11.46 V |
| Cells | 3 |
| Last checked | 2026-10-06 |
Compatible models (5)
- Lenovo ThinkPad T470 (20HD, 20HE, 20JM, 20JN)
- ThinkPad T480 (20L5, 20L6)
- ThinkPad A475
- ThinkPad A485
- ThinkPad 25
Laptops compatible with 01AV421
Fits 5 laptops: 5 OEM confirmed, 0 seller listed, 0 reported by users.
Also sold as: 01AV419, 01AV420, 01AV489, SB10K97576, SB10K97577, SB10K97578
- Lenovo ThinkPad T470 (Core i5-7300U, 8GB, 256GB, 14-inch FHD)OEM confirmedMatched on: part number 01AV421, listed as Lenovo ThinkPad T470 (20HD, 20HE, 20JM, 20JN)
- ThinkPad 25OEM confirmedMatched on: part number 01AV421
- ThinkPad A475OEM confirmedMatched on: part number 01AV421
- ThinkPad A485OEM confirmedMatched on: part number 01AV421
- ThinkPad T480 (20L5, 20L6)OEM confirmedMatched on: part number 01AV421
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Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.
Manufacturer: Lenovo Last updated: 2026-10-06
Lenovo 01AV421 Replacement Battery Review
Lenovo 01AV421 replacement battery: the 3 cell 11.46V 24Wh internal front battery for the ThinkPad T470 and T480, also listed by Lenovo for the A475, A485 and ThinkPad 25.
The T470 and T480 run two batteries at once. This is the fixed one inside the base, Battery 1, reached by removing the bottom cover. Lenovo's parts lookup treats 01AV419, 01AV420, 01AV421 and 01AV489 as interchangeable service parts for it. It also fits the ThinkPad A475, A485 and ThinkPad 25. It is not the removable rear pack, which is the 01AV423 family. Disable the built-in battery in the BIOS before you open the base. Rated 3 cell, 11.46V, 24Wh.
Fitment answer
Maker-confirmed fit, firmware state not yet recorded: Lenovo's parts lookup lists the 3 cell 11.46V 24Wh 01AV421 as the internal front battery for the ThinkPad T470 and T480.
Which laptops this fits
Lenovo ThinkPad T470 (machine types 20HD, 20HE, 20JM, 20JN) and T480 (20L5, 20L6).
Lenovo ThinkPad A475, A485 and ThinkPad 25.
Source: Lenovo's parts lookup for the T480 type 20L5 and our catalog data.
What to check before you buy
This is Battery 1, the internal pack under the base cover. The removable rear pack (01AV423, ThinkPad Battery 61) is a different part for a different bay.
Disable the built-in battery in the BIOS before opening the base.
Screw down mounting, 3 cell, 11.46V, 24Wh on the OEM label.
Part numbers this replaces
01AV419, 01AV420 and 01AV489, which Lenovo treats as interchangeable service parts. Lenovo also lists SB10K97576, SB10K97577 and SB10K97578 for the same pack.
Safety and handling
A swollen pack means stop using the device now. Do not charge it, press on it, puncture it or pry at it with metal tools, and keep it out of water and household waste.
New packs ship at partial charge, around 30 percent, because air transport rules for lithium ion batteries require it. A pack that arrives low is correct, not faulty. Charge it fully before you judge it.
Recycle the old pack at an electronics or battery drop-off point. Never mail it back.
Age and condition
Lithium ion loses capacity on the shelf. Battery University's storage figures show roughly 96 percent retained after a year at 25C and 40 percent charge, against about 80 percent for a pack stored full. A pack that sat in a warehouse for years can arrive tired.
None of the listings we checked for this pack state a manufacture date code, so check the date printed on the label when it arrives. If the date is more than two years old, we would ask the seller for a fresher unit.
If this is not yours
If the label on your old pack does not read 01AV421, this page is not your answer. Use our battery finder at /laptop-batteries and search by your laptop's exact model number or by the code printed on the old pack. The rear removable battery is the 01AV423.
Our verdict
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- ThinkPad T470 and T480 owners replacing the internal front battery
- ThinkPad A475, A485 and ThinkPad 25 owners
Not for
- Anyone replacing the removable rear battery, which is the 01AV423 family
- ThinkPad T470s and T480s owners
Specifications
What these specs mean| Brand | Lenovo |
|---|---|
| Battery Model Code | 01AV421 |
| OEM Spare Part Number | 01AV419, 01AV420, 01AV421, 01AV489, SB10K97576, SB10K97577, SB10K97578 |
| Nominal Voltage | 11.46 V |
| Cell Count | 3 |
| Series Configuration | 3S |
| Capacity Wh | 24 Wh |
| Capacity Basis | OEM Label |
| Mounting Method | Screw Down |
| Compatible Models | Lenovo ThinkPad T470 (20HD, 20HE, 20JM, 20JN), ThinkPad T480 (20L5, 20L6), ThinkPad A475, ThinkPad A485, ThinkPad 25 |
| Replaces Part Numbers | 01AV419, 01AV420, 01AV489 |
FAQs
Is there a bigger internal battery for the T480?
We have no Lenovo listing for one. Extra capacity on these machines comes from the rear bay, which per Lenovo also takes the 48Wh Battery 61+ and the 72Wh Battery 61++.
Why does my laptop say the battery is not genuine?
Lenovo shows "Genuine Lenovo battery not attached" when it does not recognize a pack. It is a detection alert, not a block: the battery still works, and on ThinkPads the alert can be turned off in ThinkPad Configuration. A Lenovo-made 01AV421 should not trigger it. A third-party clone sold under the same code may, and we have no source on which clones do.
Why did my new 01AV421 arrive at 30 percent?
Because it has to. IATA rules in force since 1 January 2026 require lithium ion batteries like this 24Wh pack to travel by air at no more than 30 percent of rated capacity. A low pack on arrival is correct. Charge it to full in the laptop and run it through a normal cycle before deciding anything about its health.
Is the 01AV421 the same as the 01AV423?
No. The 01AV421 is the internal front battery inside the base. The 01AV423 is the removable rear battery, ThinkPad Battery 61. Different bays, not interchangeable.