Home » Lenovo 45N1129 Compatible Laptop Battery 10.8V (4400mAh / 48Wh) Li-ion
Lenovo 45N1129 Compatible Laptop Battery 10.8V (4400mAh / 48Wh) Li-ion
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Lenovo 45N1129 Compatible Laptop Battery 10.8V (4400mAh / 48Wh) Li-ion
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Lenovo 45N1129 Compatible Laptop Battery 10.8V (4400mAh / 48Wh) Li-ion

SKU: LLN241-BP-K009
C$45.00
In stock
Orders placed after 3:00 PM (PT) will be processed on the next business day.

More Compatible Options

→ Shop all Lenovo laptop adapters → Shop all Lenovo laptop batteries
  • Compatible Brands Lenovo
  • Model/OPN 45N1129
  • Cell Type Conventional Li-ion
  • Capacity 4400mAh / 48Wh
  • Output Voltage 10.8V
  • Warranty 1 Year
Ships from Canada • Fast local delivery

This compatible replacement laptop battery for Lenovo 45N1129 is available for C$45.00 . 10.8V · 4400mAh / 48Wh · Conventional Li-ion.

Important Notes
  • This battery is not compatible with
  • ThinkPad P50s,T460S, T430s, X240S, L470, X270
  • The battery will protrude out the (bottom/side) of the laptop and will cause your laptop to sit at an angle. You may not be able to connect to a docking station with the extended battery.
Compatible Model
Lenovo W Series ThinkPad W550s 20E10000USLenovo W Series ThinkPad W550s 20E10007USLenovo W Series ThinkPad W550s 20E2000BLenovo W Series ThinkPad W550s 20E2000LLenovo W Series ThinkPad W550s 20E2000NLenovo W Series ThinkPad W550s 20E2000SUSLenovo W Series ThinkPad W550s 20E20017USLenovo W Series ThinkPad W550s 20E2001BUSLenovo W Series ThinkPad W550s 20E2001VLenovo W Series ThinkPad W550s 20E20022USLenovo W Series ThinkPad W550s 20E20023USLenovo ThinkPad X Series ThinkPad X240 20AL0011Lenovo ThinkPad X Series ThinkPad X240 20AL007LLenovo ThinkPad X Series ThinkPad X240 20AL007YLenovo ThinkPad X Series ThinkPad X240 20AL008ELenovo ThinkPad X Series ThinkPad X240 20AL008HUSLenovo ThinkPad X Series ThinkPad X240 20AL008PUSLenovo ThinkPad X Series ThinkPad X240 20AL0090USLenovo ThinkPad X Series ThinkPad X240 20AL0092USLenovo ThinkPad X Series ThinkPad X240 20AL0093USLenovo ThinkPad X Series ThinkPad X240 20AL009BUSLenovo ThinkPad X Series ThinkPad X240 20AL009KUSLenovo ThinkPad X Series ThinkPad X240 20AL00BQLenovo ThinkPad X Series ThinkPad X240 20AL00BULenovo ThinkPad X Series ThinkPad X240 20AL00D3USLenovo ThinkPad X Series ThinkPad X240 20AL00D7USLenovo ThinkPad X Series ThinkPad X240 20AM0011USLenovo ThinkPad X Series ThinkPad X240 20AM001CUSLenovo ThinkPad X Series ThinkPad X240 20AM001FLenovo ThinkPad X Series ThinkPad X240 20AM001JLenovo ThinkPad X Series ThinkPad X240 20AM001VLenovo ThinkPad X Series ThinkPad X240 20AM004PLenovo ThinkPad X Series ThinkPad X240 20AM004TLenovo ThinkPad X Series ThinkPad X240 20AM004TUSLenovo ThinkPad X Series ThinkPad X240 20AM005CUSLenovo ThinkPad X Series ThinkPad X240 20AM005YLenovo ThinkPad X Series ThinkPad X240 20AM0065USLenovo ThinkPad X Series ThinkPad X240 20AM006KLenovo ThinkPad X Series ThinkPad X240 20AM006LLenovo ThinkPad X Series ThinkPad X240 20AM009QLenovo ThinkPad X Series ThinkPad X240 20AM009SLenovo ThinkPad X Series ThinkPad X240 20AM009SUSLenovo ThinkPad X Series ThinkPad X240 20AM00AQUSLenovo ThinkPad X 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Original Part Number
45N1137 45N1734 00HW034 45N1125 121500212 45N1124 45N1735 45N1767 121500147 5B10G10726 45N1127 45N1126 45N1132 45N1135 0C52861 45N1136 121500214 45N1160 L12L3P53 SB10F46471 45N1134 121500213 L14S6F01 00HW033 45N1130 45N1129 0C52862 45N1777 121500152 121500148 45N1128 L12M6Z53 45N1131 45N1736 45N1133 5B10G09007 L14M6F01 45N1738 SB10F46472 45N1737 121500146
How can I confirm a replacement laptop battery will fit?
The best way is to match the part number printed on your current battery. Then verify the voltage, and compare the battery shape plus connector location with the product photos and specs.
How can I find my laptop model on a Windows laptop?
If you are using a Windows laptop, you can find your laptop model using System Information:

• Step 1: Press Windows + R to open the Run window.
• Step 2: Type msinfo32 and click OK.
• Step 3: In the System Summary section, find System Model in the right pane.

This model information helps ensure you select the correct replacement battery.
Where do I find the battery part number?
Power off the laptop, unplug the charger, and remove the battery if it’s removable. The part number is printed on the label on the battery itself—use that to confirm compatibility.
Can I use a battery with a different voltage?
In most cases, no—battery voltage should match the original. Some labels are equivalent (10.8V = 11.1V, and 14.4V = 14.8V), but other voltage differences are not compatible.
What should I check before buying a replacement online?
Start with the original battery part number and voltage. After that, compare size and shape, connector type and position, latch/clip placement, and orientation using product photos and details.
Can I search by laptop model instead of battery part number?
The laptop model helps narrow results, but the battery part number is more accurate. One laptop model can use multiple battery versions, so matching the printed part number is recommended.
Any quick tips to improve laptop battery runtime?
Turn on Power Saver/Battery Saver, lower screen brightness, close unused apps and tabs, disable Wi-Fi/Bluetooth when you don’t need them, and keep vents clear to reduce heat.

Picking the correct replacement battery (and adapter, if needed) matters for safety and performance. Battpit stocks a wide range of compatible part numbers and models across major laptop brands. Use the checklist below before you place your order:

1. Identify Your Laptop Model

  • Check the label on the bottom of the laptop or your system information for the exact model.
  • If you’re purchasing an adapter, verify the input requirements shown on your laptop label (voltage/current).

2. Match the Battery Part Number

Always shut down the laptop before removing the battery. The part number printed on the battery label is the most reliable way to confirm the correct replacement.

3. Common Part Number Examples

Brands often use predictable formats. Here are a few examples to help you recognize them:

HP / Compaq:
123456-001
Sony:
PCGA-BP12, VGP-BP1
Dell:
312-1234, 1234P
IBM / Lenovo:
02K1234, 08K1234
Toshiba:
PA1234U-1BRS

4. Compare the Physical Fit

Double-check the overall shape, connector type and connector position, plus the latch/lock location and orientation. Compare these with product photos before ordering.

5. Voltage Notes

Some laptops have multiple battery options with different voltages (for example, 11.1V vs 14.8V). These are not interchangeable. Always match the voltage printed on your original battery.

  • Li-ion 10.8V is equivalent to 11.1V.
  • Li-ion 14.4V is equivalent to 14.8V.

Example Labels

Example battery label showing part number and voltage
Safety & Compliance

Certified Quality You Can Trust

Battpit Canada replacement laptop batteries and AC adapters are selected with safety, compatibility, and compliance in mind. Products may meet common industry standards including RoHS, CE, UL, and ULC where applicable.

RoHS
RoHS Compliant Helps reduce restricted hazardous substances in electronic products.
CE
CE Marked Designed to meet applicable safety and quality requirements.
UL
UL Recognized Components Selected products may use UL recognized cells, components, or protection circuits.
ULC
ULC Safety Standard Supports safety confidence for products supplied to Canadian customers.
Why this matters: These compliance marks help customers choose a reliable replacement laptop battery, laptop charger, or AC adapter with built-in safety features such as over-charge, over-current, over-voltage, and short-circuit protection.