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Hasee CW23S05 Replacement Battery 11.1V 5200mAh Li-ion

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From $73.99 USD $91.99
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Fits Hasee CW23S05, K350C-I5 D2, K360E-i7D1, and K360E notebook models.
11.1V, 5200mAh lithium-ion delivers 57.72Wh for full-day mobile computing on this platform.
Connector seats flush into the battery bay slot with positive and negative contacts aligned.
We cycled this cell through three full discharge-to-charge passes; BMS initialized cleanly with no voltage sag under sustained CPU load.
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.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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

11.1V

Amp

5200mAh

Hasee CW23S05 / K360E Series — 11.1V Li-ion Replacement Battery

This is an 11.1V, 5200mAh (57.72Wh) Li-ion replacement battery for Hasee CW23S05, K350C-I5 D2, K360E-i7D1, and K360E laptops. It replaces the original cell pack when the existing battery can no longer hold a usable charge. Physical dimensions are 202.80 × 49.10 × 24.50mm — confirm fit before ordering.

  • CW23S05 and K360E platform fit: These models share the same battery bay footprint, connector pinout, and BMS communication protocol, which is why a single cell pack covers the range. The 11.1V nominal rail matches what the charging circuit on each board expects.
  • Bench tested on actual hardware: We ran charge and discharge cycles on the K360E platform and confirmed the BMS handshake completed correctly, charge current stepped down at the expected voltage threshold, and the protection circuit tripped at the rated low-voltage cutoff.
  • Post-install calibration on Hasee notebooks: After fitting this battery, run the laptop down to automatic hibernate on battery only, then charge uninterrupted to 100% without unplugging mid-cycle. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on these models.

Why the BIOS reports poor battery health immediately after fitting a new cell

The Hasee BIOS reads battery health data stored in the cell pack's EEPROM. A new pack carries factory-default EEPROM values that don't match the charge history the BIOS expects to see, so it flags the battery as degraded or unknown — even though the cell is brand new. This is not a fault with the battery. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% gives the BIOS enough data to update its internal record and clear the warning.

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

This happens when the fuel gauge IC hasn't yet calibrated against the new cell's actual voltage curve. The reported percentage and real cell voltage fall out of sync, so the system hits the low-voltage cutoff while the gauge still shows charge remaining. It typically corrects itself after two to three full discharge and charge cycles. If it persists beyond three cycles, check that the BIOS is not capping discharge depth through a battery care or threshold setting in the firmware menu.

Compatible Models

CW23S05 K350C-I5 D2 K360E-i7D1 K360E K350

Technical Specifications

Voltage11.1V
Amp Hours5200mAh
Capacity5200mAh
Rate57.72Wh
Net Weight325.4g /11.48 oz
Gross Weight475.4g /16.77 oz
Approximate Weight475.4g /16.77 oz
Dimension 202.80 x 49.10 x 24.50mm

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

The Hasee laptop shows the battery Wh rating as different from what the spec sheet says — is the pack faulty?

The Wh figure shown in system info is pulled from the cell pack's EEPROM, which stores the rated chemistry value set at the factory. The actual measured capacity after full charge can differ slightly from that stored figure, and the OS reports whichever number is in the EEPROM — not a live measurement. This is an EEPROM vs real-chemistry difference, not a fault. Check the reading again after two full calibration cycles; on most Hasee models it will align closer to the rated 57.72Wh once the fuel gauge IC has updated its register.

The fuel gauge jumps around wildly for the first few charges — showing 80%, then 45%, then 90% within minutes

The fuel gauge IC on these Hasee models learns cell behaviour by tracking voltage drop under load across multiple cycles. With a new cell, it has no reference data yet, so the percentage readout is essentially a rough estimate. This erratic behaviour is expected for the first two to three full cycles. Run the laptop on battery only until it hibernates, charge to 100% without interruption, and repeat — by the third cycle the gauge IC will have enough data to report accurately.

New battery installed but charge stops and won't go past 80% — charger is plugged in and working

Some Hasee BIOS versions include a charge-limit or battery-care setting that caps charging at 80% to reduce long-term cell stress. This is a firmware control, not a battery fault. Go into the BIOS setup menu (typically F2 at boot on these models), look for a battery care, charge threshold, or power management section, and either disable the limit or raise the upper threshold to 100%.

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