Lenovo 5B11B48825 Replacement Battery
- Brand:
- Lenovo
- Capacity Wh:
- 80 Wh
- Nominal Voltage:
- 15.36 V
Quick facts
5B11B48825 is a battery that fits 3 laptop models: Lenovo Legion 5 15ACH6H (82JU), Legion 5 15ACH6 (82JW), Legion 5 15ITH6 (82JK). It is also sold as 5B11B48824, 5B11B48829, 5B11B48830, SB11B48821, SB11B48822.
| Part number | 5B11B48825 |
|---|---|
| Part type | Battery |
| Also sold as | 5B11B48824, 5B11B48829, 5B11B48830, SB11B48821, SB11B48822 |
| Capacity | 80 Wh |
| Voltage | 15.36 V |
| Cells | 4 |
| Last checked | 2026-10-06 |
Compatible models (3)
- Lenovo Legion 5 15ACH6H (82JU)
- Legion 5 15ACH6 (82JW)
- Legion 5 15ITH6 (82JK)
Laptops compatible with 5B11B48825
Fits 3 laptops: 3 OEM confirmed, 0 seller listed, 0 reported by users.
Also sold as: 5B11B48824, 5B11B48829, 5B11B48830, SB11B48821, SB11B48822
- Legion 5 15ACH6 (82JW)OEM confirmedMatched on: part number 5B11B48825
- Legion 5 15ITH6 (82JK)OEM confirmedMatched on: part number 5B11B48825
- Lenovo Legion 5 15ACH6H (Ryzen 7 5800H, RTX 3060, 16GB, 15.6-inch FHD 165Hz)OEM confirmedMatched on: part number 5B11B48825, listed as Lenovo Legion 5 15ACH6H (82JU)
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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 5B11B48825 Replacement Battery Review
Lenovo 5B11B48825 replacement battery: the 4 cell 15.36V 80Wh battery for the Legion 5 15ACH6H (82JU), also listed by Lenovo for the Legion 5 15ACH6 and 15ITH6.
This is the larger of the two batteries Lenovo offered on the 2021 Legion 5 15 inch. Lenovo's parts lookup lists it for the 15ACH6H (82JU), 15ACH6 (82JW) and 15ITH6 (82JK) and treats 5B11B48824, 5B11B48825, 5B11B48829 and 5B11B48830 as interchangeable service parts. Lenovo does not list it for the 17 inch Legion 5 models. The same 15 inch machines were also sold with a 60Wh battery from the 5B11B48816 family, so check the Wh on your old label.
Fitment answer
Maker-confirmed fit, firmware state not yet recorded: Lenovo's parts lookup lists the 4 cell 15.36V 80Wh 5B11B48825 for the Legion 5 15ACH6H, 15ACH6 and 15ITH6.
Which laptops this fits
Lenovo Legion 5 15 inch, 2021: 15ACH6H (82JU), 15ACH6 (82JW), 15ITH6 (82JK).
Not listed by Lenovo for the 17 inch Legion 5.
Source: Lenovo's parts lookup for the 15ACH6H type 82JU.
What to check before you buy
These machines shipped with either this 80Wh battery or a 60Wh battery from the 5B11B48816 family. Check the Wh rating on the old label.
Lenovo does not list this pack for the 17 inch Legion 5.
4 cell, 15.36V, 80Wh on the OEM label.
Part numbers this replaces
5B11B48824, 5B11B48829 and 5B11B48830, which Lenovo treats as interchangeable service parts. Lenovo also lists SB11B48821 and SB11B48822.
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 5B11B48825, 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 60Wh option is the 5B11B48816.
Our verdict
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- Legion 5 15ACH6H, 15ACH6 and 15ITH6 owners whose old pack is 80Wh
Not for
- 17 inch Legion 5 owners
- Legion 5 owners on the 60Wh battery, until the upgrade is confirmed
Specifications
What these specs mean| Brand | Lenovo |
|---|---|
| Battery Model Code | 5B11B48825 |
| OEM Spare Part Number | 5B11B48824, 5B11B48825, 5B11B48829, 5B11B48830, SB11B48821, SB11B48822 |
| Nominal Voltage | 15.36 V |
| Cell Count | 4 |
| Series Configuration | 4S |
| Capacity Wh | 80 Wh |
| Capacity Basis | OEM Label |
| Compatible Models | Lenovo Legion 5 15ACH6H (82JU), Legion 5 15ACH6 (82JW), Legion 5 15ITH6 (82JK) |
| Replaces Part Numbers | 5B11B48824, 5B11B48829, 5B11B48830 |
FAQs
Can I fit this 80Wh pack in a Legion 5 that came with 60Wh?
Lenovo lists both for the same machine types, but we have no Lenovo source on whether a 60Wh unit needs other parts to take the 80Wh pack. We treat the upgrade as unknown and would confirm with Lenovo first.
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 5B11B48825 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 5B11B48825 arrive at 30 percent?
Because it has to. IATA rules in force since 1 January 2026 require lithium ion batteries like this 80Wh 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.