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Trogon E12 Series Replacement Battery 12V 3800mAh DR36

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From $89.99 USD $110.99
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Fits Trogon E12 Series notebooks; replaces OEM part DR36 or DR36S.
12V 3800mAh Ni-MH chemistry delivers 45.6Wh; sustains laptop runtime under full CPU and display load.
Connector seats flush into the E12 battery slot with mechanical locking tab; no force required on insertion.
We bench-tested this cell against the OEM DR36 across three charge-discharge cycles; BMS accepted the pack on first connection without 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 inaccurate health warnings that appear after every cell swap.
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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.

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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

12V

Amp

3800mAh

Trogon E12 Series — 12V Ni-MH Replacement Battery (DR36)

This is a 12V 3800mAh Ni-MH replacement battery for the Trogon E12 Series notebook. It replaces OEM part numbers DR36 and DR36S. The battery restores portable power to laptops running depleted or failed original cells.

  • E12 Series fitment: The E12 Series uses a shared battery bay with a consistent 12V rail and a standardised connector pinout across this notebook line. DR36 and DR36S are interchangeable OEM references for the same physical pack — both fit the same housing and connect to the same charge controller.
  • Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the E12 platform. The BMS accepted the new cell without fault flags, charge current stepped down correctly as the pack approached capacity, and the protection circuit tripped cleanly at low-voltage cutoff.
  • Post-installation calibration on the E12: After fitting this battery, run the notebook down to hibernate cutoff under normal use — do not force shutdown — then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after swapping cells in this notebook.

BIOS reporting poor battery health after fitting the DR36

When you swap a Ni-MH pack in the E12 Series, the BIOS reads stored EEPROM data from the previous cell and compares it against the new pack's initial state. The mismatch triggers a "degraded" or "poor health" flag even on a brand-new battery. This is not a fault with the replacement cell. One complete discharge-to-hibernate followed by a full uninterrupted charge resets the learn cycle and brings the health readout in line with the actual cell condition.

Fuel gauge reading wildly off for the first few charge cycles

The fuel gauge IC in the E12 calculates remaining capacity against a stored charge profile built from previous cell data. A new Ni-MH cell with different internal resistance throws those calculations off immediately. The gauge corrects itself after two to three full discharge and recharge cycles as the IC builds a fresh profile. Do not judge the replacement pack on the first cycle — let it reach a stable resting voltage of around 12.0V before trusting the percentage readout.

Compatible Models

E12 Series

Replaces Part Numbers

DR36 DR36S

Technical Specifications

Voltage12V
Amp Hours3800mAh
Capacity3800mAh
Rate45.6Wh
Gross Weight150g /5.29 oz
Approximate Weight150g /5.29 oz
Dimension 139.50 x 89.00 x 20.00mm

Product Highlights

  • Brand: Trogon
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My Trogon E12 is shutting down at around 25% battery shown — why won't it run down to zero?

This is a voltage cliff issue specific to Ni-MH chemistry under combined CPU and display load. As the cell depletes, internal resistance climbs and the voltage drops faster than the fuel gauge tracks it. The laptop's undervoltage protection trips before the displayed percentage reaches zero. Run two or three full calibration cycles — discharge to hibernate cutoff, charge uninterrupted to 100% — and the gauge will align more accurately with the actual cutoff point.

The E12 BIOS is showing the wrong Wh rating for the new DR36 — it says something different from the 45.6Wh spec.

The Wh figure shown in BIOS is pulled from EEPROM data written by the original factory cell, not measured live from the replacement pack. The DR36 replacement carries its own chemistry data that may differ from what the previous cell logged. This does not affect how the battery charges or discharges. After one full learn cycle the reported figure will update to reflect the actual cell in the bay.

The replacement battery isn't charging above 80% on the E12 — is the cell faulty?

An 80% charge ceiling on the E12 is almost always a BIOS-controlled charge limit, not a cell problem. Some Trogon notebook firmware activates a charge conservation mode that caps charging to extend cycle life — check the BIOS power settings or any bundled battery management utility for a "battery care" or "charge limit" toggle. Disable it, then run a full charge cycle. If the pack still stops at 80% with that setting off, confirm the charge controller is delivering the correct termination voltage of approximately 14.4V at the pack terminals.

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