Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com
WELCOME5
BatteryWeb

Dell Vostro 1220 Replacement Battery 11.1V 4400mAh 312-0140

Up to 18% off
New arrival
From $104.99 USD $125.99
Shipping calculated at checkout.
Fits Dell Vostro 1220 and Vostro 1220n laptops; replaces OEM part numbers 312-0140, 429-14244, J130N, and N887N.
11.1V, 4400mAh lithium-ion cell delivers 48.84Wh — enough capacity to sustain this ultraportable through a full workday on WiFi or light office tasks.
Connector slides into the battery slot on the bottom panel; locking tab engages automatically when you push the pack forward until it clicks.
We charged from empty to full with the Dell charger and verified the BMS accepted the host system's 4.2V termination signal without early cutoff.
After installation, run one full discharge to hibernation-cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
WECARE5

Please Confirm Delivery Timeline

Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
4.8
★★★★★
★★★★★
Average Customer Rating
By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe
✦

Check that your old battery model number and device model to match our description. This makes sure they work together.

✦

We ship your order same day if you buy it before 4 PM EST.

Warranty

Let customers speak for us

from 12 reviews

I'm writing this review to express my deep gratitude and appreciation for the quality of services provided to me by the BatteryWeb service team. I visited BatteryWeb to purchase a replacement battery for my Remington R9 razor. The staff was very responsive and I was really impressed with their willingness to help me and make the purchasing process as quick as possible. In particular I greatly appreciate the work of staff member Shane who was friendly and helpful.
In conclusion, I believe that BatteryWeb has excellent service staff who make their customers feel honored and valued.
I wish you all the best.
Sincerely,
Michael

Michael Talianker
BatteryWeb

this battery was just what I needed.

Robert Jones
BatteryWeb

Product is exactly as described and arrived quickly

Robert Jones
Rocket ES4-12 Compatible Replacement Battery

Great deal for the money.

Linda M.
BatteryWeb

It took a bit longer than expected, likely due to the holiday season, but that was understandable. So far, the battery seems to be working well!

Linda M.
MGE UPS Systems Pulsar EX 1500RT Compatible Replacement Battery By Bright Way

Excellent substitute for the original, appearing to be the perfect replacement.

Alberto J.
APC SMART-UPS RT SURTA3000RMXL3U UPS High Performance Replacement Battery Set

It was what i was looking for. Support is fast

Jaswal
WAHEGURUG - RADHASWAMI

Fast service

Mark Casias
BatteryWeb

Perfect fit

Mark Casias
STX20L-BS Battery for Harley Softail FLS FLST 1991-2017 High Performance

Works Perfectly!!

Ben Benson
Invacare 220 Scooter High Performance Medical Replacement Battery Set

Send Your Battery Photo

Expert Technician Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.

POST YOUR BATTERY IMAGE
Product & Solutions Expert

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

11.1V

Amp

4400mAh

Dell Vostro 1220 / 1220n — 11.1V Li-ion Replacement Battery (312-0140)

This 11.1V, 4400mAh Li-ion battery replaces the original cell in the Dell Vostro 1220 and 1220n notebooks. It matches OEM part numbers 312-0140, 429-14244, J130N, and N887N. Rated at 48.84Wh, it restores full portable operation when the factory battery no longer holds a charge.

  • Vostro 1220 and 1220n compatibility: Both models share the same 11.1V battery bay, connector pinout, and BMS communication protocol. One cell fits both without any adapter or modification.
  • Bench tested on actual hardware: We cycled this cell through full charge and discharge on a Vostro 1220 unit. The BMS handshake completed correctly, the BIOS accepted the cell without fault flags, and charge current tapered normally at the 4400mAh ceiling.
  • First-cycle recalibration on the Vostro 1220: After fitting this battery, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.

Why the Vostro 1220 BIOS reports poor battery health after a cell swap

The Vostro 1220 stores charge history and health data in the battery's EEPROM. When a new cell arrives, that EEPROM contains factory defaults the BIOS doesn't recognise as a valid charge history. The system flags this as degraded or unknown health. Running one complete discharge-to-hibernate then a full uninterrupted charge writes fresh data to the learn cycle and resolves the warning without any firmware update.

Laptop shuts down at 20–30% charge shown on the gauge

This happens when the fuel gauge IC hasn't yet calibrated against the new cell's actual voltage curve. The old curve is still in memory, so the percentage reading drifts from the real state of charge. Under combined CPU and display load, the cell hits a voltage cliff before the gauge catches up, and the system shuts down to protect itself. Run two full discharge-to-hibernate and full recharge cycles — the fuel gauge IC recalibrates against the new cell and the cutoff stabilises above 10V under load.

Compatible Models

Vostro 1220 Vostro 1220n

Replaces Part Numbers

312-0140 429-14244 J130N N887N

Technical Specifications

Voltage11.1V
Amp Hours4400mAh
Capacity4400mAh
Rate48.84Wh
Net Weight315g /11.11 oz
Gross Weight495g /17.46 oz
Approximate Weight495g /17.46 oz
Dimension 232.80 x 44.50 x 39.80mm

Product Highlights

  • Brand: Dell
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

Dell BIOS shows the new battery as "unknown" or "poor health" straight out of the box — is the cell faulty?

No — the BIOS is reading EEPROM data the new cell doesn't yet have. The original battery wrote charge history into its own EEPROM over many cycles; the replacement arrives with factory defaults the system flags as invalid. Run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. That single learn cycle writes fresh data and clears the health warning.

The Vostro 1220 system info shows the wrong Wh rating for this battery — it doesn't match the 48.84Wh spec. What's going on?

The Wh figure shown in system info is pulled from the EEPROM's rated capacity field, not measured from the actual chemistry. New cells ship with a factory default value that may differ from the installed battery's real rating until the BIOS completes a full learn cycle. Run one complete discharge-to-hibernate and full recharge. After that cycle, the BIOS recalculates from actual charge data and the displayed Wh figure corrects itself.

New battery charges to 80% then stops — Dell power manager shows "plugged in, not charging." Is this a battery fault?

This is a BIOS-controlled charge limit, not a cell fault. Dell's firmware on some Vostro units activates a charge threshold that caps at 80% to reduce long-term cell stress. Go to Dell Power Manager (or Dell Command | Power Manager if installed), navigate to Battery Settings, and set the charge mode to "Primarily AC" or raise the upper threshold to 100%. The battery will then charge to full capacity.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Bancontact
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Related Products

Dell Vostro 1220 Replacement Battery, 11.1V, 4400mAh, Li-ion 1

Engineered for Performance. Built to Last.

Check out our top-rated selection of reliable products built to last. We offer high-quality options that deliver consistent performance for all your needs.

Our Collections