New 80Wh 15.4V Battery for Lenovo Legion Pro 5 16IRX8/16ARX8, Pro 7 16IRX8H, ThinkBook 16p G4-IRH Replaces L22M4PC0 L22X4PC0 5B11K38959 Grade A Cells 2-Year Warranty

Why You Need This Battery

Your Lenovo Legion Pro 5 or Pro 7 is a powerhouse built for serious gaming and creative work. But even the best batteries degrade over time shorter runtime, unexpected shutdowns when the battery meter still reads 2030%, or the system refusing to hold a charge. Replacing it with a cheap, lowquality battery often leads to false capacity readings, swelling, or failure within months.

This 5B11K38959 / L22X4PC0 battery solves that problem delivering true 80Wh / 5181mAh capacity with brand new Grade A Li-Polymer cells. What you see is what you get.

Designed for Lenovo Legion Pro & ThinkBook Series

This battery is a direct fit for the following models. Use Ctrl+F to search for your specific model:

Series Compatible Models
Legion Pro 5 16IRX8 (82WK0019AU, 82WK0083US, 82WKCTO1WW, 82WK00BAAU, 82WK00BCAU, 82WK00DTAU, 82WK00GPAU), 16ARX8 (82WM005EGE, 82WM006XAU, 82WMCTO1WW)
Legion Pro 7 16IRX8H (82WQCTO1WW), 16ARX8H, 16IRX8
ThinkBook 16p G4-IRH
Replaces OEM part numbers (partial list):

Common P/N
L22X4PC0, L22M4PC0, L22C4PC0, L22D4PC0, L22B4PC0
5B11K38959, 5B11K38949, 5B11K38950, 5B11K38953, 5B11K38955, 5B11K38957, 5B11K38961
5B11N45394, 5B11N45395, 5B11N45404, 5B11N45419, 5B11N45420, 5B11N45428, 5B11N45439
L22M4PC1, L22D4PC1, 4ICP4/62/141, 4ICP5/64/137
SB11K38951, SB11K38952, SB11K38954, SB11K38956, SB11K38958, SB11K38960, SB11K38962
SB11N45400, SB11N45405, SB11N45408, SB11N45409, SB11N45427, SB11N45431, SB11N45440

Specifications

You Can Trust

Specification Detail
Model 5B11K38959 / L22X4PC0 / L22M4PC0
Chemistry Li-Polymer (Li-ion)
Cells 4Cell
Voltage 15.4V ( 15.44V compatible)
Capacity 5181mAh / 80Wh
Recharge Cycles 300500 cycles
Color Black
Safety Standards CE, FCC, RoHS
Condition Brand new Grade A cells
Warranty 30day return + 2year warranty
What a Cheap or Failing Battery Costs You

Short gaming sessions Your laptop dies after 4560 minutes of gaming.

Performance throttling CPU/GPU slows down to prevent random shutdowns.

Swelling Dangerous bulging that can crack the palm rest or bottom case.

System errors Battery not recognized warnings and inaccurate battery percentage readings.

What Our Battery Delivers

Feature Cheap Generic Our Premium Battery
True Capacity Often under 70Wh (fake label) 80Wh (tested)
Cells Recycled or lowgrade Brand new Grade A
Runtime (gaming) 11.5 hours 23+ hours
Swelling Risk High within months Low, proper BMS
Safety Standards None CE, FCC, RoHS
Warranty None or 30 days 30day return + 2year warranty
Who Is This Battery For?

Lenovo Legion Pro 5 16IRX8 / 16ARX8 owners who want to restore or upgrade battery life.

Legion Pro 7 16IRX8H / 16ARX8H gamers who need extended unplugged gaming sessions.

ThinkBook 16p G4-IRH users running demanding professional workloads.

Anyone whose original battery is swollen or no longer holds a charge.

Why Choose Our Battery?

Genuine Grade A Li-Polymer cells Premium cells from top-tier manufacturers not recycled or refurbished.

Exact OEM specifications Matches Lenovo's original 80Wh / 15.4V design.

Advanced safety protection Overcharge, overdischarge, overcurrent, shortcircuit, and overtemperature protection built in.

100% tested Each unit is tested for capacity and cycle life before shipping.

2year warranty Buy with confidence. If anything goes wrong, we've got you covered double the industry standard.

Installation Note

Replacing the battery requires removing the bottom cover. The battery is internally connected via a cable. Professional installation is recommended if you're not experienced. Tools not included.

What's Included

1 x 5B11K38959 / L22X4PC0 Replacement Battery (80Wh / 4cell)