Home » Lenovo 42T4431 Compatible Laptop Adapter 20V 4.5A 90W (Fixed 16-Tip)
Lenovo 42T4431 Compatible Laptop Adapter 20V 4.5A 90W (Fixed 16-Tip)
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Lenovo 42T4431 Compatible Laptop Adapter 20V 4.5A 90W (Fixed 16-Tip)
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Lenovo 42T4431 Compatible Laptop Adapter 20V 4.5A 90W (Fixed 16-Tip)

SKU: AC20V90+-+16+Tip-BP-K019
C$25.00
In stock
Orders placed after 3:00 PM (PT) will be processed on the next business day.
🔥 This product has a special offer: Buy 2 eligible items, get 1 item at 50% OFF
Discount applies to the lower-priced item in each pair. Repeats automatically. Not combinable with other offers.

More Compatible Options

→ Shop all Lenovo laptop adapters → Shop all Lenovo laptop batteries
  • Compatible Brands Lenovo
  • Model/OPN 42T4431
  • Output Current 4.5A
  • Output Voltage 20V
  • Input Voltage AC100~240V / 50~60Hz
  • Power 90W
  • Tip Size 8.0*5.5mm
  • Warranty 1 Year
Ships from Canada • Fast local delivery

This replacement laptop adapter for Lenovo 42T4431 is available for C$25.00 — Buy 1, get 1 at 50% off . 20V · 4.5A · 90W · Tip: 8.0*5.5mm.

Important Notes
  • Please make sure the DC output and tip size are compatible before placing the order.
Compatible Model
Lenovo ThinkPad X Series ThinkPad X120e 0596Lenovo ThinkPad X Series ThinkPad X120e 0611Lenovo ThinkPad X Series ThinkPad X120e 0613Lenovo ThinkPad X Series ThinkPad X121e 3051Lenovo ThinkPad X Series ThinkPad X130e 0629Lenovo ThinkPad X Series ThinkPad X131e 3367Lenovo ThinkPad X Series ThinkPad X131e 3367-9CULenovo ThinkPad X Series ThinkPad X131e 3367-9DULenovo ThinkPad X Series ThinkPad X131e 3368-3NULenovo ThinkPad X Series ThinkPad X131e 3368-48ULenovo ThinkPad X Series ThinkPad X131e 3372-2NULenovo ThinkPad X Series ThinkPad X131e 3372-2ZULenovo ThinkPad X Series ThinkPad X131e 3372-3PULenovo ThinkPad X Series ThinkPad X140e 20BM000DUSLenovo ThinkPad X Series ThinkPad X200siLenovo ThinkPad X Series ThinkPad X201iLenovo ThinkPad X Series ThinkPad X201s 5413Lenovo ThinkPad X Series ThinkPad X220 4292Lenovo ThinkPad X Series ThinkPad X220 4293Lenovo ThinkPad X Series ThinkPad X220 Tablet 4299-2TULenovo ThinkPad X Series ThinkPad X230 2320-33ULenovo ThinkPad X Series ThinkPad X230 2320-37ULenovo ThinkPad X Series ThinkPad X230 2320-A3ULenovo ThinkPad X Series ThinkPad X230 2320-J9ULenovo ThinkPad X Series ThinkPad X230 2320-L8ULenovo ThinkPad X Series ThinkPad X230 2324-3NULenovo ThinkPad X Series ThinkPad X230 2324-3RULenovo ThinkPad X Series ThinkPad X230 2324-3SULenovo ThinkPad X Series ThinkPad X230 2324-5RULenovo ThinkPad X Series ThinkPad X230 2324-65GLenovo ThinkPad X Series ThinkPad X230 2324-67ULenovo ThinkPad X Series ThinkPad X230 2325-2GGLenovo ThinkPad X Series ThinkPad X230 2325-2SULenovo ThinkPad X Series ThinkPad X230 2325-3QULenovo ThinkPad X Series ThinkPad X230 2325-5NULenovo ThinkPad X Series ThinkPad X230 2325-5PULenovo ThinkPad X Series ThinkPad X230 2325-78GLenovo ThinkPad X Series ThinkPad X230 Tablet 3435-59ULenovo ThinkPad X Series ThinkPad X230 Tablet 3437-2AULenovo ThinkPad X Series ThinkPad X230 Tablet 3438-25ULenovo ThinkPad X Series ThinkPad X230 Tablet 3438-2SULenovo ThinkPad X Series ThinkPad X230 Tablet 3438-3TGLenovo ThinkPad X Series ThinkPad X230i 2324-6SGLenovo ThinkPad X Series ThinkPad X230i 2325Lenovo ThinkPad X Series ThinkPad X230i 2325-A9GLenovo ThinkPad Twist Series ThinkPad Twist 3347A34Lenovo ThinkPad Twist Series ThinkPad Twist S230u 3347-29GLenovo ThinkPad Twist Series ThinkPad Twist S230u 3347-6LULenovo ThinkPad Twist Series ThinkPad Twist S230u 3347-76ULenovo ThinkPad Twist Series ThinkPad Twist S230u 3347-84ULenovo ThinkPad T Series ThinkPad T410 2518Lenovo ThinkPad T Series ThinkPad T410i 2516Lenovo ThinkPad T Series ThinkPad T410i 2522Lenovo ThinkPad T Series ThinkPad T420 4237Lenovo ThinkPad T Series ThinkPad T420s 4174 2AULenovo ThinkPad T Series ThinkPad T420s-4172Lenovo ThinkPad T Series ThinkPad T430 2342-34ULenovo ThinkPad T Series ThinkPad T430 2342-38ULenovo ThinkPad T Series ThinkPad T430 2342-47ULenovo ThinkPad T Series ThinkPad T430 2344-6WULenovo ThinkPad T Series ThinkPad T430 2344-BPULenovo ThinkPad T Series ThinkPad T430 2344-BTGLenovo ThinkPad T Series ThinkPad T430 2344-BUGLenovo ThinkPad T Series ThinkPad T430 2347-G4GLenovo ThinkPad T Series ThinkPad T430 2347-GAULenovo ThinkPad T Series ThinkPad T430 2347-H6ULenovo ThinkPad T Series ThinkPad T430 2347-H7ULenovo ThinkPad T Series ThinkPad T430 2347-J9GLenovo ThinkPad T Series ThinkPad T430 2349-G3ULenovo ThinkPad T Series ThinkPad T430 2349-G4GLenovo ThinkPad T Series ThinkPad T430 2349-GZGLenovo ThinkPad T Series ThinkPad T430 2349-JQULenovo ThinkPad T Series ThinkPad T430 2349-KBGLenovo ThinkPad T Series ThinkPad T430 2349-N3GLenovo ThinkPad T Series ThinkPad T430 2349-PZGLenovo ThinkPad T Series ThinkPad T430s 2352-2KULenovo ThinkPad T Series ThinkPad T430s 2353-AYULenovo ThinkPad T Series ThinkPad T430s 2353-B5ULenovo ThinkPad T Series ThinkPad T430s 2355-GMULenovo ThinkPad T Series ThinkPad T430s 2355-HHULenovo ThinkPad T Series ThinkPad T430s 2355-HMGLenovo ThinkPad T Series ThinkPad T430s 2355-JCULenovo ThinkPad T Series ThinkPad T430s 2356-G2GLenovo ThinkPad T Series ThinkPad T430s 2356-H8ULenovo ThinkPad T Series ThinkPad T430s 2356-HBULenovo ThinkPad T Series ThinkPad T430s 2356-L9ULenovo ThinkPad T Series ThinkPad T430s 2356-LAULenovo ThinkPad T Series ThinkPad T430s 2356-MGULenovo ThinkPad T Series ThinkPad T430s 2356-MLGLenovo ThinkPad T Series ThinkPad T430s 2356-N5GLenovo ThinkPad T Series ThinkPad T430si 2353Lenovo ThinkPad T Series ThinkPad T430u 33515XCLenovo ThinkPad T Series ThinkPad T430u 335169CLenovo ThinkPad T Series ThinkPad T430u 33519WCLenovo ThinkPad T Series ThinkPad T430u 3351A49Lenovo ThinkPad T Series ThinkPad T430u 3351-B3ULenovo ThinkPad T Series ThinkPad T430u 3352-2NULenovo ThinkPad T Series ThinkPad T430u 3353-38GLenovo ThinkPad T Series ThinkPad T430u 3353-3KGLenovo ThinkPad T Series ThinkPad T430u 3353-3NGLenovo ThinkPad T Series ThinkPad T430u 6273-24ULenovo ThinkPad T Series ThinkPad T430u 6273-25ULenovo ThinkPad T Series ThinkPad T430u 6273-26GLenovo ThinkPad T Series ThinkPad T430u 6273-3CULenovo ThinkPad T Series ThinkPad T430u 8614-6YULenovo ThinkPad T Series ThinkPad T430u 8614-ANULenovo ThinkPad T Series ThinkPad T510 4339Lenovo ThinkPad T Series ThinkPad T510i 4313Lenovo ThinkPad T Series ThinkPad T510i 4314Lenovo ThinkPad T Series ThinkPad T530 2359-4DULenovo ThinkPad T Series ThinkPad T530 2392-3XULenovo ThinkPad T Series ThinkPad T530 2392-69ULenovo ThinkPad T Series ThinkPad T530 2392-6AULenovo ThinkPad T Series ThinkPad T530 2394-45GLenovo ThinkPad T Series ThinkPad T530 2394-5VULenovo ThinkPad T Series ThinkPad T530 2429-42ULenovo ThinkPad T Series ThinkPad T530 2429-43GLenovo ThinkPad T Series ThinkPad T530 2429-43ULenovo ThinkPad T Series ThinkPad T530 2429-44ULenovo ThinkPad T Series ThinkPad T530 2429-73GLenovo ThinkPad T Series ThinkPad T530 2429-8CGLenovo ThinkPad T Series ThinkPad T530 2429-8DGLenovo ThinkPad T Series ThinkPad T530i 2392Lenovo ThinkPad S Series ThinkPad S230uLenovo ThinkPad S Series ThinkPad S230u 3347A34Lenovo ThinkPad L Series ThinkPad L430 2465-29GLenovo ThinkPad L Series ThinkPad L430 2465-2FULenovo ThinkPad L Series ThinkPad L430 2465-63ULenovo ThinkPad L Series ThinkPad L430 2466-3GULenovo ThinkPad L Series ThinkPad L430 2466-64ULenovo ThinkPad L Series ThinkPad L430 2468-34GLenovo ThinkPad L Series ThinkPad L430 2468-3DGLenovo ThinkPad L Series ThinkPad L430 2468-3PGLenovo ThinkPad L Series ThinkPad L430 2468-3QGLenovo ThinkPad L Series ThinkPad L430 2468-55GLenovo ThinkPad L Series ThinkPad L430 2468-62ULenovo ThinkPad L Series ThinkPad L430 2468-6DGLenovo ThinkPad L Series ThinkPad L430 2468-6GGLenovo ThinkPad L Series ThinkPad L430 2469-26ULenovo ThinkPad L Series ThinkPad L430 2469-27ULenovo ThinkPad L Series ThinkPad L530 2478-2AGLenovo ThinkPad L Series ThinkPad L530 2478-2AULenovo ThinkPad L Series ThinkPad L530 2478-2CGLenovo ThinkPad L Series ThinkPad L530 2478-32GLenovo ThinkPad L Series ThinkPad L530 2478-33ULenovo ThinkPad L Series ThinkPad L530 2478-4NGLenovo ThinkPad L Series ThinkPad L530 2478-64ULenovo ThinkPad L Series ThinkPad L530 2479-32ULenovo ThinkPad L Series ThinkPad L530 2479-33ULenovo ThinkPad L Series ThinkPad L530 2479-3AULenovo ThinkPad L Series ThinkPad L530 2479-3MULenovo ThinkPad L Series ThinkPad L530 2479-44GLenovo ThinkPad L Series ThinkPad L530 2479-62GLenovo ThinkPad L Series ThinkPad L530 2481-34ULenovo ThinkPad L Series ThinkPad L530 2481-5GGLenovo ThinkPad Edge Series ThinkPad Edge 14 0199Lenovo ThinkPad Edge Series ThinkPad Edge E120Lenovo ThinkPad Edge Series ThinkPad Edge E130 3358Lenovo ThinkPad Edge Series ThinkPad Edge E135 3359-5ZGLenovo ThinkPad Edge Series ThinkPad Edge E145 20BCLenovo ThinkPad Edge Series ThinkPad Edge E145 20BC000ULenovo ThinkPad Edge Series ThinkPad Edge E330 3354-4NGLenovo ThinkPad Edge Series ThinkPad Edge E330 3354-ARGLenovo ThinkPad Edge Series ThinkPad Edge E330 3354-AVGLenovo ThinkPad Edge Series ThinkPad Edge E330 3354-BMGLenovo ThinkPad Edge Series ThinkPad Edge E335 3355Lenovo ThinkPad Edge Series ThinkPad Edge E335 3355-5ZGLenovo ThinkPad Edge Series ThinkPad Edge E335 3355-6AGLenovo ThinkPad Edge Series ThinkPad Edge E430c 3365-4YULenovo ThinkPad Edge Series ThinkPad Edge E430c 3365-72ULenovo ThinkPad Edge Series ThinkPad Edge E530 3259-9VGLenovo ThinkPad Edge Series ThinkPad Edge E530 3259-9ZGLenovo ThinkPad Edge Series ThinkPad Edge E530 3259-BQGLenovo ThinkPad Edge Series ThinkPad Edge E530 3259-HNGLenovo ThinkPad Edge Series ThinkPad Edge E530 3259-HQGLenovo ThinkPad Edge Series ThinkPad Edge E530 3259-M3GLenovo ThinkPad Edge Series ThinkPad Edge E530 3259-MUGLenovo ThinkPad Edge Series ThinkPad Edge E530 3259-TFGLenovo ThinkPad Edge Series ThinkPad Edge E530 6272-39GLenovo ThinkPad Edge Series ThinkPad Edge E530 6272-3AGLenovo ThinkPad Edge Series ThinkPad Edge E530 6272-3CGLenovo ThinkPad Edge Series ThinkPad Edge E530 6272-3NGLenovo ThinkPad Edge Series ThinkPad Edge E530c 3366-2WULenovo ThinkPad Edge Series ThinkPad Edge E530c 3366-2YULenovo ThinkPad Edge Series ThinkPad Edge E530c 3366-33ULenovo ThinkPad Edge Series ThinkPad Edge E530c 3366-4ZGLenovo ThinkPad Edge Series ThinkPad Edge E535 3260Lenovo ThinkPad Edge Series ThinkPad Edge E535 3260-DVGLenovo ThinkPad Edge Series ThinkPad Edge E535 3260-DVULenovo ThinkPad Edge Series ThinkPad Edge E535 3260-FMULenovo ThinkPad Edge Series ThinkPad Edge E535 3260-FPGLenovo ThinkPad Edge Series ThinkPad Edge E545 20B2001AUSLenovo M Series - Lenovo M490s HarbinLenovo K Series - Lenovo K43P - LenovoLenovo IdeaPad Series Ideapad U31-70 M500E7USLenovo Essential B Series Essential B590 6274-2JGLenovo 3000 N Series 3000 N100 0768Lenovo 3000 C Series 3000 C100 0761-2CULenovo 3000 C Series 3000 C200 8922-2BULenovo 3000 C Series 3000 C200 8922-BFU
Original Part Number
92P1214 41R4493 92P1154 92P1156 92P1104 PA-1650-161 92P1107 92P1109 92P1110 92P1155 92P1106 40Y7659 92P1160 92P1159 92P1158 PA-1900-081 93P5026 92P1153 PA-1900-17I 92P1114 92P1211 92P1212 92P1112 92P1157 40Y7696 92P1111 92P1108 45N0314 45N0192 42T4431 45N0068 45N0200 45N0118 45N0312 45N0122 42T4439 45N0186 45N0310 45N0053 42T5000 45N0180 40Y7663 45N0202 40Y7664 45N0120 45N0316 45N0212 41R4322 45N0055 45N0306 45J7717 45N0322 42T4423 45N0059 45N0080 40Y7668 40Y7670 45N0318 45N0210 45N0308 45N0302 PA-1650-53I 45N0057 40Y7665 42T4425 42T5283 42T4416 45N0194 40Y7673 45N0320 45N0208 45N0184 40Y7671 45N0198 42T4429 45N0116 42T4418 45N0110 40Y7662 42T5282 42T4427 45N0214 42T4417 40Y7667 45N0112 40Y7672 42T4419 45N0324 40Y7674 45N0182 40Y7666 45N0304 40Y7669 45N0196 45N0114 42T4421 92P1103 40Y7661
How can I confirm a replacement laptop adapter will work with my laptop?
Match the output voltage exactly, then confirm the connector type/size and polarity. Wattage can be the same or higher than your original adapter.
Where do I find the voltage and wattage information?
Check the label on your original charger (or the laptop’s bottom label). Look for Output (V) and Wattage (W). The voltage must match exactly.
Can I use an adapter with a different voltage?
In most cases, no. Using the wrong voltage can cause charging issues or damage your laptop.
Can I use a higher wattage adapter (for example 90W instead of 65W)?
Yes—higher wattage is usually OK as long as the voltage matches and the connector fits. Your laptop will only draw the power it needs.
How do I confirm the connector size is correct?
Compare the tip with your original charger and check the listed connector size (OD × ID). Even small differences (like 5.5×2.1mm vs 5.5×2.5mm) may not fit properly.
What does polarity mean, and why does it matter?
Polarity indicates which part of the plug is positive/negative. It must match your original adapter for safe and reliable charging.
My laptop uses USB-C charging. Can I use any USB-C charger?
Not always. Your laptop may require USB-C Power Delivery (PD) and a minimum wattage (such as 45W/65W/90W). Use a PD charger that meets or exceeds your laptop’s requirement.
Can this adapter be used internationally?
Many adapters support 100–240V input. Check your charger label. If it supports 100–240V, you can use it overseas with the correct plug adapter.
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.

Choosing the correct replacement adapter matters for safety and charging performance. Use this checklist before you place your order:

1. Match the Output Voltage

  • Check your original charger label for Output (for example, 19V).
  • The output voltage should match exactly.

2. Confirm Wattage / Amperage

  • Wattage can be the same or higher than your original adapter.
  • Using higher wattage is usually fine if voltage and connector match.

3. Check Connector Type & Size

  • For barrel tips, match the connector size (OD × ID).
  • For USB-C, ensure it supports USB-C PD and enough wattage for laptops.

4. Verify Polarity

  • Match the polarity symbol shown on your original adapter label.

💡 Battpit tip: Before using any laptop adapter, always check:
• Output voltage (must match exactly)
• Wattage (same or higher is OK)
• Connector size & polarity

All Battpit laptop adapters are designed with advanced built-in safety protection features to ensure reliable and stable charging performance. Our replacement AC adapters help protect your laptop, battery, and internal components during everyday use.

  • Over-voltage protection – Protects your laptop from sudden voltage spikes and unstable power supply.
  • Over-current protection – Prevents excessive current flow to maintain safe and consistent charging.
  • Short-circuit protection – Automatically shuts down the power adapter if a fault is detected.
  • Over-temperature protection – Helps reduce overheating risks for safer long-term use.

Each Battpit replacement laptop charger is engineered to meet high safety and quality standards, providing dependable performance for your notebook computer at home, office, or travel.

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.