ACCESSORIES-MALL
B31N1424 Battery Replacement for Asus A401LB K401LB K401UB K401UQ R415UB R415UQ Laptop
B31N1424 Battery Replacement for Asus A401LB K401LB K401UB K401UQ R415UB R415UQ Laptop
Couldn't load pickup availability
Genuine B31N1424 vs. Generic: How to Choose the Right Replacement Battery for Your ASUS A401 / K401 / R415 Series
If you have an ASUS A401LB, K401LB, K401UB, K401UQ, R415UB, or R415UQ, you know these laptops are durable. Sleek, reliable, and perfect for daily productivity, streaming, or light creative work. When the original battery fades, the reliable laptop turns into a desk-bound machine. It’s always searching for an outlet.
When it’s time to replace the B31N1424 battery, you have three choices: pay ASUS’s OEM price, gamble on a cheap generic, or look for a genuine-spec replacement. The last choice gives you the same performance without the high cost.
This guide explains the B31N1424 battery for ASUS A401, K401, and R415 series. It highlights the battery's special features. It shows how to find a reliable replacement. Plus, it suggests ways to keep your ASUS running well.
What Exactly Is the ASUS B31N1424 Battery?
The B31N1424 is the factory‑spec lithium‑ion battery designed for the ASUS A401LB, K401LB, K401UB, K401UQ, R415UB, and R415UQ laptops. It’s a slim, high‑density internal pack that balances portability with enough runtime to get through a day of classes, meetings, or entertainment.
| Specification | Value |
|---|---|
| Model / Part Number | B31N1424 |
| Compatible Models | ASUS A401LB, K401LB, K401UB, K401UQ, R415UB, R415UQ |
| Replaces Part Number : | 0B200-01390000, B31N1424 |
| Compatible Laptop Models: | A401LB, A401UB, A401UQ, A401UQ-FA123T, K401LB, K401LB-1A, K401LB-FA003H, K401LB-FA007H, K401LB-FA012D, K401LB-FA013D, K401LB-FA013H, K401LB-FA021H, K401LB-FA036H, K401LB-FR026T, K401LB-FR036H, K401LB-FR042H, K401LB-FR046T, K401LB-FR052D, K401LB-FR053D, K401LB-FR054H, K401LB-FR068D, K401LB-FR068T, K401LB-FR084D, K401LB-FR119D, K401LB-WS71, K401LB5010, K401LB5200, K401LB5500, K401U, K401UB, K401UB-2A, K401UB-FR004T, K401UB-FR006T, K401UB-FR008D, K401UB-FR009D, K401UB-FR016T, K401UB-FR028D, K401UB-FR038T, K401UB-FR049D, K401UQ, K401UQ-2A, K401UQ-7200U, K401UQ-FA074T, K401UQ-FA075T, K401UQ-FA079T, K401UQ-FA085T, K401UQ-FA090D, K401UQ-FA096T, K401UQ-FA098T, K401UQ-FA115D, K401UQ-FA120D, K401UQ-FA126T, K401UQ-FA141T, K401UQ-FA177D, K401UQ-FA183T, K401UQ-FR007D, K401UQ-FR008D, K401UQ-FR047T, K401UQK, R415LB, R415UB, R415UB-FR027T, R415UB-FR042T, R415UQ, R415UQ-FA108T, R415UQ-FA109T, R415UQ-FR014T, V401LB, V401UB, V401UQ, V405LB, V405UB, V405UQ |
| Typical Capacity | 48–56 WHr (watt‑hours, depends on configuration) |
| Chemistry | Lithium‑ion (high‑density cells) |
| Voltage | 11.4 V nominal |
| Safety Features | Over‑charge, over‑discharge, short‑circuit protection, temperature monitoring |
A healthy B31N1424 battery means your ASUS actually delivers the all‑day portability it was designed for—not a laptop that dies before lunch.
Genuine‑Spec vs. OEM vs. Generic: What’s Actually Different?
Not every battery that “fits” your ASUS behaves the same. Here’s what separates a reliable replacement from one that will leave you frustrated.
| Factor | Genuine‑Spec Replacement (B31N1424) | OEM (ASUS Original) | Typical Generic / No‑Name |
|---|---|---|---|
| Cell Quality | OEM‑matched cells (LG / Samsung / Murata grade) | Original manufacturer cells | Unknown or lower‑grade cells; capacity often overstated |
| Capacity | True original capacity (48–56Wh) | OEM spec | Often under‑rated; actual may be 20–30% less |
| Protection Circuit | Full PCM with over‑voltage, under‑voltage, short‑circuit, temperature protection | Full protection | Minimal or missing protection; higher risk of swelling or failure |
| BIOS / EC Communication | Accurate fuel gauge; Windows shows true remaining runtime and health | Accurate | May fail to communicate; laptop may not charge or show incorrect percentage |
| Physical Fit | Exact fit; connector aligns perfectly | Exact fit | May be slightly off; connector may not seat fully |
| Charging Behavior | Supports ASUS fast charging (if laptop supports it) | Supports fast charging | May charge slowly, overheat, or stop charging prematurely |
| Longevity | 400–500 cycles while maintaining >80% capacity | 400–500 cycles | Often drops below 70% capacity within 6–12 months |
| Price | Moderate (sweet spot) | Highest (often 2×) | Lowest but highest risk |
Important
The B31N1424 is an internal battery. If you install a generic that doesn’t communicate properly with the laptop’s embedded controller, you may not know until you’ve already closed up the case—and then you’re stuck with a laptop that won’t charge, won’t report battery percentage accurately, or shuts down randomly. Saving $20 on a generic isn’t worth the headache.
What Realistic Runtime Can You Expect?
These ASUS models are older but still capable. A healthy B31N1424 will give you:
| Workload | Expected Runtime |
|---|---|
| Light productivity (email, web, Office) | 4–6 hours |
| Video streaming (Netflix, YouTube) | 3–5 hours |
| Mixed use (light multitasking) | 3–4 hours |
If you’re getting significantly less than this, your battery is likely worn out. A genuine‑spec replacement restores original performance.
One Battery vs. Spare: What’s the Real Need?
Since the B31N1424 is internal, you’re replacing the aging battery. But the choice of what you install matters.
| Situation | Cheap Generic | Genuine‑Spec Replacement |
|---|---|---|
| You need the laptop for classes or remote work | Risky; unknown runtime, possible sudden shutdowns | ✔ Consistent performance you can rely on |
| You travel occasionally with the laptop | Unreliable; could die during a flight or in a coffee shop | ✔ Dependable runtime when you need it most |
| You plan to keep the ASUS for another 2–3 years | Will likely need another replacement within a year | ✔ One replacement covers the rest of the laptop’s useful life |
| You’re selling the laptop or passing it to a family member | A generic signals “cheap repair” to a buyer | ✔ A genuine‑spec replacement adds value and confidence |
| You mostly use it plugged in | Might be acceptable if you don’t mind the risk | ✔ Still a better long‑term value |
For anyone who still relies on these ASUS models, the extra cost of a genuine‑spec battery pays for itself in peace of mind alone.
How to Identify a Reliable B31N1424 Replacement
Based on feedback from repair shops and ASUS owners, here are three things to look for when buying a B31N1424 battery:
-
Exact Part Number Match
The battery should clearly list B31N1424. If it says “fits ASUS K401” but doesn’t include this specific number, it’s likely a generic with unknown internals. -
Built‑in Safety Protection
Ensure the battery includes a PCM (protection circuit module) with over‑voltage, under‑voltage, short‑circuit, and temperature protection. This is non‑negotiable for internal laptop batteries. -
Fresh Stock & Warranty
Lithium‑ion cells degrade even when unused. A trustworthy supplier will provide a manufacturing date (or guarantee freshness within the last 12 months) and offer a 12‑18 month warranty. Avoid sellers who can’t provide these details.
What Does a Genuine ASUS B31N1424 Battery Cost?
Pricing varies significantly based on source and authenticity.
| Source | Typical Price Range (USD) | What You Get |
|---|---|---|
| OEM (ASUS direct / authorized service) | $80 – $110 | Genuine, but with full retail markup |
| Third‑party “Compatible” | $25 – $40 | Unknown cell quality; often lower actual capacity; short lifespan |
| Genuine‑Spec Replacement (This Battery) | $40 – $60 | OEM‑matched cells, true original capacity, full protection circuit, exact compatibility, warranty |
The genuine‑spec replacement hits the sweet spot: the same internal quality as the OEM version, sold without the inflated brand markup. You avoid the gamble of a generic without paying the premium ASUS price.
Frequently Asked Questions
Q: Will this battery work with my specific ASUS laptop?
Yes, if your model is in the compatible list. This B31N1424 battery works with ASUS A401LB, K401LB, K401UB, K401UQ, R415UB, and R415UQ. To confirm, check your current battery label—if it says B31N1424, this is the direct replacement.
Q: How do I know if my current battery needs replacement?
Common signs:
-
The laptop shuts down when unplugged despite showing remaining charge
-
Battery percentage jumps erratically (e.g., 60% to 10% suddenly)
-
Windows reports “consider replacing your battery” in the battery health report
-
The battery takes unusually long to charge, or doesn’t charge at all
-
Physical swelling (you may notice the touchpad or bottom case bulging)
If your battery is more than 2–3 years old or has seen heavy daily use, it’s likely time.
Q: Can I install the B31N1424 battery myself?
Yes, but it requires opening the laptop. Most ASUS A401/K401/R415 models have a removable bottom cover. Disconnect the battery cable, remove the old battery, install the new one, and reconnect. If you’re comfortable with basic laptop repair, it’s a 10‑minute job. If not, a local repair shop can do it quickly. Always power down and disconnect the charger first.
Q: Will a third‑party battery void my ASUS warranty?
No. In most regions (including the US, under the Magnuson‑Moss Warranty Act), using a third‑party replacement part does not void the warranty unless the part itself caused damage. If your laptop is still under warranty (unlikely for these older models), keep the original battery in case service is needed.
Q: Does this battery support ASUS fast charging?
Yes, if your laptop supports it. This genuine‑spec battery supports the same charging protocols as the original.
Q: Is it safe to buy a third‑party ASUS battery?
Yes, if it’s a genuine‑spec replacement. The key is to verify the OEM‑matched cells, true original capacity, built‑in protection circuit, and warranty. Avoid sellers who can’t confirm these details or whose prices are suspiciously low—those are often the batteries that swell or fail within months.
Ready to Get Your ASUS Back to Reliable Portability?
Don’t let a worn‑out battery turn your trusty ASUS into a desk‑bound machine. This genuine‑spec B31N1424 replacement gives you the same performance, safety, and runtime as the original—at a price that makes replacing an aging battery a straightforward decision.
Click ‘Add to Cart’—and get back to using your ASUS where you want, not just where there’s an outlet.
Genuine B31N1424 vs. Generic: How to Choose the Right Replacement Battery for Your ASUS A401 / K401 / R415 Series
If you have an ASUS A401LB, K401LB, K401UB, K401UQ, R415UB, or R415UQ, you know these laptops are durable. Sleek, reliable, and perfect for daily productivity, streaming, or light creative work. When the original battery fades, the reliable laptop turns into a desk-bound machine. It’s always searching for an outlet.
When it’s time to replace the B31N1424 battery, you have three choices: pay ASUS’s OEM price, gamble on a cheap generic, or look for a genuine-spec replacement. The last choice gives you the same performance without the high cost.
This guide explains the B31N1424 battery for ASUS A401, K401, and R415 series. It highlights the battery's special features. It shows how to find a reliable replacement. Plus, it suggests ways to keep your ASUS running well.
What Exactly Is the ASUS B31N1424 Battery?
The B31N1424 is the factory‑spec lithium‑ion battery designed for the ASUS A401LB, K401LB, K401UB, K401UQ, R415UB, and R415UQ laptops. It’s a slim, high‑density internal pack that balances portability with enough runtime to get through a day of classes, meetings, or entertainment.
| Specification | Value |
|---|---|
| Model / Part Number | B31N1424 |
| Compatible Models | ASUS A401LB, K401LB, K401UB, K401UQ, R415UB, R415UQ |
| Replaces Part Number : | 0B200-01390000, B31N1424 |
| Compatible Laptop Models: | A401LB, A401UB, A401UQ, A401UQ-FA123T, K401LB, K401LB-1A, K401LB-FA003H, K401LB-FA007H, K401LB-FA012D, K401LB-FA013D, K401LB-FA013H, K401LB-FA021H, K401LB-FA036H, K401LB-FR026T, K401LB-FR036H, K401LB-FR042H, K401LB-FR046T, K401LB-FR052D, K401LB-FR053D, K401LB-FR054H, K401LB-FR068D, K401LB-FR068T, K401LB-FR084D, K401LB-FR119D, K401LB-WS71, K401LB5010, K401LB5200, K401LB5500, K401U, K401UB, K401UB-2A, K401UB-FR004T, K401UB-FR006T, K401UB-FR008D, K401UB-FR009D, K401UB-FR016T, K401UB-FR028D, K401UB-FR038T, K401UB-FR049D, K401UQ, K401UQ-2A, K401UQ-7200U, K401UQ-FA074T, K401UQ-FA075T, K401UQ-FA079T, K401UQ-FA085T, K401UQ-FA090D, K401UQ-FA096T, K401UQ-FA098T, K401UQ-FA115D, K401UQ-FA120D, K401UQ-FA126T, K401UQ-FA141T, K401UQ-FA177D, K401UQ-FA183T, K401UQ-FR007D, K401UQ-FR008D, K401UQ-FR047T, K401UQK, R415LB, R415UB, R415UB-FR027T, R415UB-FR042T, R415UQ, R415UQ-FA108T, R415UQ-FA109T, R415UQ-FR014T, V401LB, V401UB, V401UQ, V405LB, V405UB, V405UQ |
| Typical Capacity | 48–56 WHr (watt‑hours, depends on configuration) |
| Chemistry | Lithium‑ion (high‑density cells) |
| Voltage | 11.4 V nominal |
| Safety Features | Over‑charge, over‑discharge, short‑circuit protection, temperature monitoring |
A healthy B31N1424 battery means your ASUS actually delivers the all‑day portability it was designed for—not a laptop that dies before lunch.
Genuine‑Spec vs. OEM vs. Generic: What’s Actually Different?
Not every battery that “fits” your ASUS behaves the same. Here’s what separates a reliable replacement from one that will leave you frustrated.
| Factor | Genuine‑Spec Replacement (B31N1424) | OEM (ASUS Original) | Typical Generic / No‑Name |
|---|---|---|---|
| Cell Quality | OEM‑matched cells (LG / Samsung / Murata grade) | Original manufacturer cells | Unknown or lower‑grade cells; capacity often overstated |
| Capacity | True original capacity (48–56Wh) | OEM spec | Often under‑rated; actual may be 20–30% less |
| Protection Circuit | Full PCM with over‑voltage, under‑voltage, short‑circuit, temperature protection | Full protection | Minimal or missing protection; higher risk of swelling or failure |
| BIOS / EC Communication | Accurate fuel gauge; Windows shows true remaining runtime and health | Accurate | May fail to communicate; laptop may not charge or show incorrect percentage |
| Physical Fit | Exact fit; connector aligns perfectly | Exact fit | May be slightly off; connector may not seat fully |
| Charging Behavior | Supports ASUS fast charging (if laptop supports it) | Supports fast charging | May charge slowly, overheat, or stop charging prematurely |
| Longevity | 400–500 cycles while maintaining >80% capacity | 400–500 cycles | Often drops below 70% capacity within 6–12 months |
| Price | Moderate (sweet spot) | Highest (often 2×) | Lowest but highest risk |
Important
The B31N1424 is an internal battery. If you install a generic that doesn’t communicate properly with the laptop’s embedded controller, you may not know until you’ve already closed up the case—and then you’re stuck with a laptop that won’t charge, won’t report battery percentage accurately, or shuts down randomly. Saving $20 on a generic isn’t worth the headache.
What Realistic Runtime Can You Expect?
These ASUS models are older but still capable. A healthy B31N1424 will give you:
| Workload | Expected Runtime |
|---|---|
| Light productivity (email, web, Office) | 4–6 hours |
| Video streaming (Netflix, YouTube) | 3–5 hours |
| Mixed use (light multitasking) | 3–4 hours |
If you’re getting significantly less than this, your battery is likely worn out. A genuine‑spec replacement restores original performance.
One Battery vs. Spare: What’s the Real Need?
Since the B31N1424 is internal, you’re replacing the aging battery. But the choice of what you install matters.
| Situation | Cheap Generic | Genuine‑Spec Replacement |
|---|---|---|
| You need the laptop for classes or remote work | Risky; unknown runtime, possible sudden shutdowns | ✔ Consistent performance you can rely on |
| You travel occasionally with the laptop | Unreliable; could die during a flight or in a coffee shop | ✔ Dependable runtime when you need it most |
| You plan to keep the ASUS for another 2–3 years | Will likely need another replacement within a year | ✔ One replacement covers the rest of the laptop’s useful life |
| You’re selling the laptop or passing it to a family member | A generic signals “cheap repair” to a buyer | ✔ A genuine‑spec replacement adds value and confidence |
| You mostly use it plugged in | Might be acceptable if you don’t mind the risk | ✔ Still a better long‑term value |
For anyone who still relies on these ASUS models, the extra cost of a genuine‑spec battery pays for itself in peace of mind alone.
How to Identify a Reliable B31N1424 Replacement
Based on feedback from repair shops and ASUS owners, here are three things to look for when buying a B31N1424 battery:
-
Exact Part Number Match
The battery should clearly list B31N1424. If it says “fits ASUS K401” but doesn’t include this specific number, it’s likely a generic with unknown internals. -
Built‑in Safety Protection
Ensure the battery includes a PCM (protection circuit module) with over‑voltage, under‑voltage, short‑circuit, and temperature protection. This is non‑negotiable for internal laptop batteries. -
Fresh Stock & Warranty
Lithium‑ion cells degrade even when unused. A trustworthy supplier will provide a manufacturing date (or guarantee freshness within the last 12 months) and offer a 12‑18 month warranty. Avoid sellers who can’t provide these details.
What Does a Genuine ASUS B31N1424 Battery Cost?
Pricing varies significantly based on source and authenticity.
| Source | Typical Price Range (USD) | What You Get |
|---|---|---|
| OEM (ASUS direct / authorized service) | $80 – $110 | Genuine, but with full retail markup |
| Third‑party “Compatible” | $25 – $40 | Unknown cell quality; often lower actual capacity; short lifespan |
| Genuine‑Spec Replacement (This Battery) | $40 – $60 | OEM‑matched cells, true original capacity, full protection circuit, exact compatibility, warranty |
The genuine‑spec replacement hits the sweet spot: the same internal quality as the OEM version, sold without the inflated brand markup. You avoid the gamble of a generic without paying the premium ASUS price.
Frequently Asked Questions
Q: Will this battery work with my specific ASUS laptop?
Yes, if your model is in the compatible list. This B31N1424 battery works with ASUS A401LB, K401LB, K401UB, K401UQ, R415UB, and R415UQ. To confirm, check your current battery label—if it says B31N1424, this is the direct replacement.
Q: How do I know if my current battery needs replacement?
Common signs:
-
The laptop shuts down when unplugged despite showing remaining charge
-
Battery percentage jumps erratically (e.g., 60% to 10% suddenly)
-
Windows reports “consider replacing your battery” in the battery health report
-
The battery takes unusually long to charge, or doesn’t charge at all
-
Physical swelling (you may notice the touchpad or bottom case bulging)
If your battery is more than 2–3 years old or has seen heavy daily use, it’s likely time.
Q: Can I install the B31N1424 battery myself?
Yes, but it requires opening the laptop. Most ASUS A401/K401/R415 models have a removable bottom cover. Disconnect the battery cable, remove the old battery, install the new one, and reconnect. If you’re comfortable with basic laptop repair, it’s a 10‑minute job. If not, a local repair shop can do it quickly. Always power down and disconnect the charger first.
Q: Will a third‑party battery void my ASUS warranty?
No. In most regions (including the US, under the Magnuson‑Moss Warranty Act), using a third‑party replacement part does not void the warranty unless the part itself caused damage. If your laptop is still under warranty (unlikely for these older models), keep the original battery in case service is needed.
Q: Does this battery support ASUS fast charging?
Yes, if your laptop supports it. This genuine‑spec battery supports the same charging protocols as the original.
Q: Is it safe to buy a third‑party ASUS battery?
Yes, if it’s a genuine‑spec replacement. The key is to verify the OEM‑matched cells, true original capacity, built‑in protection circuit, and warranty. Avoid sellers who can’t confirm these details or whose prices are suspiciously low—those are often the batteries that swell or fail within months.
Ready to Get Your ASUS Back to Reliable Portability?
Don’t let a worn‑out battery turn your trusty ASUS into a desk‑bound machine. This genuine‑spec B31N1424 replacement gives you the same performance, safety, and runtime as the original—at a price that makes replacing an aging battery a straightforward decision.
Click ‘Add to Cart’—and get back to using your ASUS where you want, not just where there’s an outlet.
| Battery Capacity | 4240mah/48Wh |
| Voltage | 11.4V |
| Model No | B31N1424 |
| Warranty | 12 Months |
🔋 Lithium-Ion Battery Conditioning
For optimal electrochemical performance, new lithium-ion batteries should undergo 2–3 complete charge and discharge cycles before reaching full capacity.
This stabilization phase allows the internal cell chemistry to achieve balanced ion distribution, ensuring maximum runtime, stable voltage output, and extended cycle life.
After this initial conditioning period, no further full discharge cycles are required.
🛡 Premium Warranty Protection
- 12-Month Limited Manufacturer Warranty
- Up to 30-Day Return Guarantee (Policy Based)
- Replacement for defective or misrepresented items
- Dedicated customer service response within 24 hours
🚚 Professional Shipping Standards
- Orders placed Monday–Friday are processed within 1–2 business days. Orders placed on weekends are processed the following Monday.
- Tracking information appears in your order within 1–2 business days after dispatch.
- Transit time varies by region and logistics carrier
- Please verify your shipping address before order confirmation
- Address changes are not possible once shipment is dispatched
📌 Product-Specific Notice
📩 Customer Care Commitment
We are committed to delivering professional-grade battery solutions and responsive after-sales service. If you experience any issues, please contact our support team before leaving feedback.
✓ Safety & Quality Assurance
- Built-in protection against overcharging, overheating, and short circuits.
- Shipped in compliance with IATA regulations for lithium batteries.
- Compatible with OEM chargers. No firmware modification required.
Questions about compatibility? Contact us with your device model number before ordering.
Cao Chuanping
Power Systems Consultant · 8+ years in replacement battery sourcing & evaluation · View profile →
All batteries sold on accessories-mall.com are replacement parts. accessories-mall.com doesn't affiliate with any of the original manufacturers. Any registered trademarks or model names listed above are identified as purposes of showing compatibility only.
