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Medion Akoya S6212T Compatible Battery 15.5V 2600mAh

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From $118.99 USD $142.99
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Fits Medion Akoya S6212T and compatible models; replaces OEM part US55-4S3000-S1L5.
15.5V, 2600mAh lithium-ion cell delivers 40.3Wh for standard portable workload demands.
Connector matches original housing; slides into battery bay with mechanical locking tab engagement.
Bench testing showed BMS accepted voltage profile on first charge cycle without fault codes.
After installation, discharge fully to system shutdown, then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears incorrect health warnings that appear after cell replacement.
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
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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
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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.

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⚠️ 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

15.5V

Amp

2600mAh

Medion Akoya S6212T Series — 15.5V Li-ion Replacement Battery (US55-4S3000-S1L5)

This is a 15.5V, 2600mAh (40.3Wh) Li-ion battery for the Medion Akoya S6212T notebook and compatible models including the MD99270, MD98453, and MD98456. It fits the original battery bay and connects to the same four-cell BMS architecture as the factory unit. Use the OEM part number US55-4S3000-S1L5 or 40046152 to verify fit against your existing cell.

  • S6212T platform compatibility: The Akoya S6212T and its MD-series variants share the same 15.5V four-cell pack architecture, connector pinout, and BMS handshake protocol — which is why a single cell covers the full range of models listed.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the S6212T platform. The BMS completed a full handshake with the BIOS, charge current tapered correctly at top-of-charge, and protection circuitry triggered at the expected low-voltage cutoff.
  • Post-install calibration on the S6212T: After fitting, run one full discharge down to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after swapping cells on this platform.

BIOS reporting poor battery health immediately after replacement

The Akoya S6212T BIOS reads health data stored in the old cell's EEPROM and compares it against the new cell's reported state. A fresh cell has no charge history, so the BIOS flags it as degraded — this is a data mismatch, not a faulty battery. Running one complete discharge-to-hibernate followed by a full uninterrupted charge gives the fuel gauge IC enough data to re-baseline against the new chemistry. After two or three full cycles, the health readout in both the BIOS and Windows normalises.

Laptop shuts off at 20–30% charge shown on screen

This happens when the fuel gauge IC is still calibrated to the old cell's discharge curve. The displayed percentage does not match actual cell voltage, so the system hits a low-voltage cliff before the gauge reaches zero. Under combined CPU and display load, voltage drops faster than the gauge tracks — the BIOS trips the cutoff to protect the cell. Discharge the laptop fully to hibernate, charge to 100% without interruption, and repeat twice. By the third cycle the fuel gauge curve aligns with the new cell and the early shutdowns stop.

Compatible Models

Akoya S6212T MD99270 MD98453 MD98456 Akoya MD98736 Akoya S6611 Akoya MD98733 Akoya MD 98457 Akoya MD 98545 Akoya MD98596 Akoya S6615T Akoya MD98548 Akoya MD 98736 Akoya MD 98732 Akoya S621xT Akoya MD98458 Akoya MD 98549 Akoya MD 98733 Akoya MD98549 Akoya S6212 Akoya MD9927 Akoya MD 98734 Akoya MD98455 Akoya S6611T Akoya MD98457 Akoya MD 98548 Akoya MD98545 Akoya MD 98596 Akoya S6615 Akoya MD98734 Akoya MD 98458 Akoya MD98456 Akoya MD 98546 Akoya MD98454 Akoya S6211 Akoya MD 98454 Akoya MD 98547 Akoya MD 98456 Akoya MD98453 Akoya S6211T Akoya MD 98453 Akoya S6212T(MD99270) Akoya MD 99270 Akoya MD99270 Akoya S6212T(MD 99270)

Replaces Part Numbers

US55-4S3000-S1L5 40046152

Technical Specifications

Voltage15.5V
Amp Hours2600mAh
Capacity2600mAh
Rate40.3Wh
Net Weight244.2g /8.61 oz
Gross Weight514.2g /18.14 oz
Approximate Weight514.2g /18.14 oz
Dimension 271.72 x 46.36 x 26.00mm

Product Highlights

  • Brand: Medion
  • 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

The Akoya S6212T shows the new battery as "0%" and won't charge past that — what's happening?

The fuel gauge IC is reading EEPROM data from the old cell and has no baseline for the new one, so it reports 0% until it collects real discharge data. Plug in the charger and leave it connected for a full uninterrupted charge cycle even if the indicator looks stuck. Then discharge the laptop normally to hibernate-cutoff and charge again to 100%. After one complete cycle the gauge re-initialises against the new cell and the percentage reading corrects itself.

Windows is showing the wrong Wh rating for this battery — it says something different from the 40.3Wh on the spec sheet. Is the cell wrong?

The Wh value Windows reads comes from the EEPROM embedded in the battery's BMS, which stores the rated capacity from the cell manufacturer's specification. The 40.3Wh on the product data is the actual measured capacity; EEPROM-stored values are sometimes rounded or reflect a slightly different factory rating for the same chemistry. This is a data reporting difference, not a capacity fault. Confirm real-world behaviour by running a full discharge cycle and checking that the laptop reaches hibernate rather than cutting off early.

The S6212T charges fine but the battery health percentage in the BIOS stays stuck at "poor" even after a week of use — is there a fix?

The BIOS health flag on this platform is calculated from accumulated charge cycle data stored in the cell's EEPROM. A new cell starts with a blank history, which the BIOS interprets as a degraded unit. The fix is to run the battery learn cycle: discharge fully to hibernate-cutoff, then charge uninterrupted to 100% — repeat this two to three times. By the third cycle the BIOS has enough real data to recalculate health accurately, and the poor-health warning clears.

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