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Evolve Maestro E book 11 Compatible Battery 7.6V 6000mAh

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From $88.99 USD $109.99
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Fits Evolve Maestro E book 11 and Maestro Evolve 3 models, replacing OEM part UTL-4766133.
7.6V, 6000mAh lithium-polymer cell delivers 45.6Wh for full-day reading and work sessions.
Connector seats flush into the original battery slot with keyed alignment tabs and locking bracket.
We bench-tested the pack on load cycle; the BMS accepted charge without early cutoff or thermal drift.
After installation, run one full discharge to hibernate-cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears inaccurate health warnings that appear after every cell swap.
Extended delivery time

Available by SPECIAL ORDER. Delivery for this product typically takes 2 weeks.

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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.

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

7.6V

Amp

6000mAh

Evolve Maestro E book 11 / Maestro Evolve 3 — 7.6V Li-Polymer Replacement Battery (UTL-4766133)

This 7.6V, 6000mAh (45.6Wh) lithium-polymer cell replaces the original UTL-4766133 battery in the Evolve Maestro E book 11 and Maestro Evolve 3 notebooks. It fits the slim 296.20 × 83.30 × 5.20mm battery bay directly. Voltage and connector match the OEM spec so the BIOS recognises the new cell without additional configuration.

  • Maestro E book 11 and Maestro Evolve 3 compatibility: Both models share the same 7.6V power rail, battery bay dimensions, and BMS connector pinout, which is why a single cell covers the pair. The EEPROM data on the replacement matches the OEM charge controller handshake, so Windows correctly identifies the battery on first boot.
  • Bench tested on actual hardware: We cycled this cell through full charge and discharge on a Maestro E book 11 unit. The BMS held a stable 7.6V nominal rail throughout, charge termination triggered cleanly at 8.7V, and the low-voltage cutoff activated without a hard crash to the board.
  • First-cycle recalibration on the Maestro E book 11: After fitting this cell, run one complete discharge down to the hibernate cutoff, then charge uninterrupted to 100% before using the device again. This resets the BIOS battery learn cycle and clears the inaccurate health or low-capacity warning that appears after every cell swap on this platform.

BIOS reporting poor battery health immediately after fitting the UTL-4766133 replacement

The Maestro E book 11 stores learned battery data in BIOS — cycle count, full-charge capacity, and wear level — from the old cell. When a new cell goes in, that stored data does not match the fresh chemistry, so BIOS flags the battery as worn or unknown. This is a firmware state, not a hardware fault with the replacement cell. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% gives the BIOS a clean data set to write against the new cell. After that single learn cycle, the health indicator should read normal.

Maestro E book 11 shutting down 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 percentage shown on screen stops matching actual cell voltage, and the laptop hits the low-voltage cutoff while the OS still shows charge remaining. It is not a fault with this cell. Run two to three full discharge-and-charge cycles without interruption to let the fuel gauge IC re-map its curve against the new 45.6Wh cell. After calibration, the shutdowns stop and the gauge tracks accurately down to the actual cutoff voltage of approximately 6.0V.

Compatible Models

Maestro E book 11 Maestro Evolve 3

Replaces Part Numbers

UTL-4766133

Technical Specifications

Voltage7.6V
Amp Hours6000mAh
Capacity6000mAh
Rate45.6Wh
Net Weight198g /6.98 oz
Gross Weight458g /16.16 oz
Approximate Weight458g /16.16 oz
Dimension 296.20 x 83.30 x 5.20mm

Product Highlights

  • Brand: Evolve
  • 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

The Maestro E book 11 shows 0% or "unknown battery" in Windows right after I put the new cell in — is something wrong with the replacement?

Nothing is wrong with the cell. The fuel gauge IC in the Maestro E book 11 is reading EEPROM data written by the old battery, and the values don't match the new cell's chemistry. Windows reports 0% or unknown until the controller gets a reference point. Plug in the charger and let it charge uninterrupted to 100%, then run a full discharge to hibernate cutoff — that single cycle gives the IC enough data to report accurately.

My Maestro E book 11 says the new battery's capacity is only around 30–35Wh in system info, but the cell is rated 45.6Wh — why the discrepancy?

The Wh figure shown in Windows Device Manager or battery reports is pulled from the EEPROM on the old cell, not measured from the new one. The BIOS hasn't yet overwritten that stored value with data from the replacement. After one complete discharge-to-hibernate and a full uninterrupted charge, the system recalculates and writes the correct figure — expect it to read close to 45.6Wh once the learn cycle completes.

The Maestro E book 11 charges to 80% then stops — the charging light goes off and nothing happens for hours. Is the cell defective?

This is a BIOS-controlled charge limit, not a cell fault. Some Evolve firmware versions activate an 80% charge cap by default to reduce long-term cell stress — the battery is full as far as the controller is concerned. Check the power management settings in the BIOS setup menu (typically accessed at boot via F2 or Delete) and look for a battery charge threshold or conservation mode option. Disable it or set the upper limit to 100%, then reboot — charging will continue to full capacity.

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