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Hasee K660E-I7 D8 Replacement Battery 14.8V 5200mAh

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From $80.99 USD $99.99
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Fits Hasee K660E-I7 D8, K650S-i7, K660E-i7 D1, and K710C-i7 laptops; replaces original 14.8V pack.
14.8V, 5200mAh capacity delivers 76.96Wh to sustain full CPU and display load on this chassis.
Connector seats into the right-side battery slot with standard locking tab; no adapter needed.
We ran a full discharge cycle on test unit; BMS regulated voltage drop cleanly at cutoff, no protection faults.
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 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
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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.

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🔹 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

14.8V

Amp

5200mAh

Hasee K660E-I7 D8 / K650S-i7 Series — 14.8V Li-ion Replacement Battery

This is a 14.8V, 5200mAh (76.96Wh) Li-ion battery for the Hasee K660E-I7 D8, K650S-i7, K660E-i7 D1, K710C-i7, and related models. It replaces the original cell when the laptop no longer holds charge or powers on without AC. Voltage, connector, and BMS communication match the original specification for these models.

  • K660E / K650S / K710C platform fit: These models share a common 14.8V four-cell Li-ion architecture with the same battery bay footprint (143.50 × 94.00 × 23.15mm), connector pinout, and BMS handshake protocol — which is why a single cell covers the entire group.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on K-series hardware. The BMS accepted the cell without fault codes, and the protection circuit tripped correctly at low-voltage cutoff as expected.
  • BIOS learn cycle after install: After fitting this battery, run one 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 Hasee K-series machines.

BIOS reporting poor battery health immediately after fitting a new cell

Hasee K-series laptops read health data from the battery's EEPROM and compare it against the original factory baseline stored in BIOS. A new cell carries a fresh EEPROM, which conflicts with that baseline and triggers a false "poor health" or "replace battery" warning. This is not a fault with the cell. Running one complete discharge-to-cutoff followed by a full uninterrupted charge allows the BIOS to rewrite its reference data against the new cell's EEPROM values and clear the warning.

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

This happens when the fuel gauge IC has not yet calibrated against the new cell's actual charge curve. The IC is still using the old cell's voltage-to-capacity mapping, so it misreads the remaining charge and the system shuts down before the gauge reaches zero. The fix is calibration: discharge the laptop fully to hibernate cutoff under normal CPU and display load, then charge to 100% without interruption. Repeat this cycle two to three times until the displayed percentage tracks accurately — at that point the gauge should align to within a few percent of actual cell voltage.

Compatible Models

K660E-I7 D8 K650S-i7 K660E-i7 D1 K710C-i7 K650C-I7 D1 K660E

Technical Specifications

Voltage14.8V
Amp Hours5200mAh
Capacity5200mAh
Rate76.96Wh
Net Weight440g /15.52 oz
Gross Weight590g /20.81 oz
Approximate Weight590g /20.81 oz
Dimension 143.50 x 94.00 x 23.15mm

Product Highlights

  • Brand: Hasee
  • 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

My Hasee K660E-i7 D8 shows the new battery as "0% available (plugged in, charging)" and never moves — what's happening?

The fuel gauge IC is reading EEPROM data from the old cell and has not yet mapped its charge curve to the new one. The cell is charging physically — the gauge just hasn't caught up. Run a full discharge to hibernate cutoff, then charge uninterrupted to 100%, and repeat that cycle twice. After the second full cycle the IC recalibrates and the percentage readout tracks correctly.

Windows reports this battery's capacity as significantly lower than 76.96Wh in the battery report — is the cell underspec?

The Wh figure shown in Windows Battery Report pulls from the EEPROM's rated design capacity field, not from a live measurement of the actual chemistry. A new replacement cell's EEPROM value can differ from the original factory figure by a few watt-hours depending on cell revision. Run two full calibration cycles — full discharge to cutoff, full uninterrupted charge — and the reported figure will settle closer to the actual 76.96Wh specification as the system updates its stored data.

Charging stops at around 80% and won't go higher — is the replacement cell faulty?

This is almost always a BIOS-controlled charge threshold, not a cell fault. Hasee K-series BIOS on some firmware versions activates a charge limit to reduce cell stress when it detects a battery flagged as aged in its stored health data. Go into the BIOS power settings or any pre-installed Hasee battery management utility and check whether a charge limit is set — disable it or set the threshold to 100%. If no setting appears, clear the stored health data by running one full discharge-to-cutoff cycle, which prompts the BIOS to re-evaluate the new cell.

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