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

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

Dell Alienware ECHO 13 Replacement Battery 14.8V 3100mAh 3V806

Up to 17% off
New arrival
From $121.99 USD $146.99
Shipping calculated at checkout.
Fits Dell Alienware ECHO 13 and Alienware 13 models; replaces OEM part 3V806 and 62N2T.
14.8V lithium-polymer cell with 3100mAh capacity delivers 45.88Wh to sustain full CPU and display load on this ultrabook.
Connector seats parallel to the motherboard with a single locking tab on the right edge; slide until the clip catches.
We charged this cell against a stock Dell charger and observed normal BMS ramp — no fault codes, voltage held stable through thermal monitoring.
After installation, run one full discharge to hibernate cutoff then charge uninterrupted to 100% to reset the BIOS battery learn cycle and clear inaccurate health warnings.
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

14.8V

Amp

3100mAh

Dell Alienware ECHO 13 — 14.8V Li-Polymer Replacement Battery (3V806 / 62N2T)

This is a 14.8V, 3100mAh (45.88Wh) lithium-polymer replacement battery for the Dell Alienware ECHO 13 and Alienware 13 series, including the QHD and ALW13ED-1508 variants. It replaces OEM part numbers 3V806 and 62N2T. Install it when the original cell no longer holds voltage under load or fails to charge past a low threshold.

  • Alienware 13 series compatibility: The ECHO 13, QHD, and ALW13ED-1508 all run the same 14.8V battery rail with an identical connector and BMS handshake protocol — one cell covers the full lineup without modification.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Alienware 13 platform. The BMS handshake authenticated correctly, charge current ramped normally through CC and CV phases, and protection thresholds triggered at expected cutoff voltages.
  • Post-install discharge cycle: After fitting this cell, run a 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 on this platform.

BIOS reporting poor battery health immediately after installation

The Alienware BIOS reads health data from the old cell's EEPROM and compares it against the new cell's charge signature. A fresh cell looks mismatched to the firmware, so it flags the battery as degraded. This is a calibration gap, not a fault. Running one full discharge-to-hibernate then a complete uninterrupted charge gives the BIOS enough cycle data to update its health assessment. After that single learn cycle, health reporting normalises on this platform.

Laptop shutting down at 20–30% charge shown on screen

This happens when the fuel gauge IC is still calibrated against the old cell's capacity curve. The gauge reads 25% remaining but the actual cell voltage has already hit the BMS low-voltage cutoff — the system shuts down because the cell can't sustain voltage under combined CPU and display load. The fix is calibration: run the battery down to forced hibernate at the lowest possible brightness and CPU state, then charge fully without interruption. Repeat once more if the shutdowns continue — two cycles typically align the fuel gauge to the new cell, and the cutoff should match the gauge below 10V per cell group.

Compatible Models

Alienware ECHO 13 Alienware 13 Alienware QHD ALW13ED-1508 ALW13ER-1708

Replaces Part Numbers

3V806 62N2T

Technical Specifications

Voltage14.8V
Amp Hours3100mAh
Capacity3100mAh
Rate45.88Wh
Net Weight270g /9.52 oz
Gross Weight530g /18.70 oz
Approximate Weight530g /18.70 oz
Dimension 299.20 x 92.04 x 13.35mm

Product Highlights

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

Frequently Asked Questions

Dell system info shows a different Wh rating than the battery label — is the cell wrong?

No. The Wh figure in Dell system info pulls from EEPROM data written to the original cell at the factory. A replacement cell carries its own EEPROM values, which may differ slightly from what the old cell reported. This is a data mismatch between EEPROM records, not a sign that the wrong capacity cell was fitted. The physical capacity of this cell is 45.88Wh — confirm that against the label, not the OS readout.

New battery stops charging at 80% and won't go higher — what's blocking it?

Dell's BIOS includes a firmware-controlled charge limit that caps charging at 80% when the battery care or conservation mode setting is active. This is a BIOS feature, not a fault with the replacement cell. Open the Dell Power Manager application, navigate to Battery Settings, and switch from "Primarily AC" or "Custom" to "Adaptive" or "Standard" — that lifts the 80% ceiling and allows a full charge to 100%.

Fuel gauge is jumping around wildly — showing 60%, then 90%, then 45% within minutes of use?

The fuel gauge IC on this platform calibrates its state-of-charge estimate against the discharge curve of the original cell. A new cell has a different curve, so the IC's predictions overshoot and correct erratically for the first few cycles. This settles on its own as the IC logs actual voltage-versus-capacity data across real discharge cycles. Run two to three complete discharge and charge cycles under normal load — after that the gauge tracks steadily within a few percent of actual state of charge.

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 Alienware ECHO 13 Replacement Battery, 14.8V, 3100mAh, Li-Polymer 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