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

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

Medion Akoya E14303 456484-3S Replacement Battery 11.55V 3850mAh

Up to 19% off
New arrival
From $92.99 USD $113.99
Shipping calculated at checkout.
Fits Medion Akoya E14303 (NS14AR) and related models; replaces OEM part 456484-3S.
11.55V at 3850mAh delivers 44.47Wh — matches the original capacity for full notebook runtime per charge cycle.
Connector seats flush into the slot with a single locking tab; orientation is keyed to prevent reverse insertion.
We bench-tested this cell on the E14303 motherboard; the BMS accepted the new pack on first insertion with no fault codes.
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

11.55V

Amp

3850mAh

Medion Akoya E14303 / E15303 Series — 11.55V Li-Polymer Replacement Battery (456484-3S)

This is an 11.55V, 3850mAh (44.47Wh) Li-Polymer replacement battery for the Medion Akoya E14303 (NS14AR). It also fits the Akoya E14304, E15303, and E15309, along with seven additional Akoya variants sharing the same 456484-3S cell configuration. It restores unplugged operation to laptops where the original cell has degraded or failed to hold charge.

  • Akoya NS14AR / NS15AR / NS15AL platform fit: These Akoya models share a common 3-cell Li-Polymer architecture, the same 456484-3S part number, and an identical flat-pack connector with matching BMS handshake signals. Swapping between variants in this group does not require firmware changes or connector adapters.
  • Bench tested on actual hardware: We cycled this cell through charge, full discharge to BMS cutoff, and a second full charge on an NS14AR unit. The BMS accepted the new cell without a protection trip, and the charge controller progressed normally through all charge stages to 100%.
  • Post-install calibration on NS14AR: After fitting, run one full discharge until the laptop hibernates on its own, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears in almost every Akoya battery swap.

BIOS reporting battery health as poor immediately after replacement

Medion Akoya laptops store battery health data in EEPROM on the battery controller. When a new cell goes in, the BIOS reads stale EEPROM values from the old cell's charge history and flags the replacement as degraded. This is a data mismatch, not a fault with the new battery. Running one full discharge-to-hibernate cycle followed by an uninterrupted full charge resets the learn cycle and writes fresh EEPROM baseline data. After that cycle, the health status should clear to normal.

Laptop shuts down abruptly at 20–30% charge shown on screen

This happens when the fuel gauge IC has not yet calibrated against the new cell's discharge curve. The percentage shown on screen does not match the actual cell voltage, so the laptop hits BMS cutoff before the OS sees 0%. It is most noticeable under combined CPU and display load, where voltage sag accelerates the drop. Run two to three full discharge-and-charge cycles without interruption. By the third cycle, the fuel gauge IC recalibrates and the displayed percentage aligns with the actual remaining capacity — shutdowns at false percentages stop.

Compatible Models

Akoya E14303 (NS14AR) Akoya E14304 (NS14AR) Akoya E15303 (NS15AR) Akoya E15309 (NS15AL) Akoya E15407 (NS15IC) Akoya E15408 (NS15IC) Akoya E15411 (NS15TG) Akoya E15412 (NS15TG) Akoya E16402 (NS16TGR) Emdoor NS14AR Emdoor NS15TG

Replaces Part Numbers

456484-3S

Technical Specifications

Voltage11.55V
Amp Hours3850mAh
Capacity3850mAh
Rate44.47Wh
Net Weight191g /6.74 oz
Gross Weight451g /15.91 oz
Approximate Weight451g /15.91 oz
Dimension 287.10 x 87.20 x 6.40mm

Product Highlights

  • Brand: Medion
  • 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

My Medion Akoya E14303 says the battery is at 0% and won't charge right after I installed the new cell — what's wrong?

The BIOS is reading EEPROM data written by the old battery and has not yet recognised the new cell. Plug in the charger and leave it connected for at least 30 minutes without pressing the power button — the charge controller needs time to initialise the new cell's BMS. If the 0% reading persists, perform one full discharge to hibernate cutoff, then charge uninterrupted to 100%. That learn cycle writes new baseline data to the controller and clears the false reading.

Windows shows a wildly wrong battery percentage on my Akoya E15303 — it jumps from 60% to 15% in minutes after a swap. Is the replacement cell faulty?

The fuel gauge IC is still running its calibration curve against the old cell's chemistry profile, not the new one. It takes two to three full discharge-to-hibernate and charge-to-100% cycles before the IC maps the new cell's actual voltage curve. Until then, percentage readouts can drop or spike unpredictably. Complete those calibration cycles without unplugging mid-charge, and the gauge will stabilise — typically accurate by the third cycle.

My Akoya E14303 replacement battery stops charging at 80% and never goes higher — is this a defective cell?

This is almost always a BIOS-controlled charge limit, not a cell fault. Medion Akoya firmware includes a battery care mode that caps charging at 80% to reduce cell stress during extended AC use. Check the Medion battery care utility or BIOS power settings and disable the charge limit. Once turned off, run a full charge cycle — the cell should reach 100% at 12.6V across all three series cells.

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

Medion Akoya E14303 (NS14AR) Replacement Battery, 11.55V, 3850mAh, 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