Compaq Pavilion ZE2000 10.8V Replacement Battery 398832-001
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Compaq Pavilion ZE2000 10.8V Replacement Battery 398832-001 - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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
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
⚠️ 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.
Compaq Pavilion ZE2000 10.8V Replacement Battery 398832-001 - is backordered and will ship as soon as it is back in stock.
Voltage
10.8V
Amp
4400mAh
Compaq Pavilion ZE2000 Series — 10.8V Li-ion Replacement Battery (398832-001)
This is a 10.8V, 4400mAh (47.52Wh) Li-ion battery for the Compaq Pavilion ZE2000-PM342AV and the broader ZE2000 and dv1000 notebook lineup. It replaces OEM part numbers 398832-001, 383493-001, 396601-001, and several related part numbers used across this platform. The connector, cell voltage, and BMS handshake match the original Compaq specification.
- ZE2000 and dv1000 platform fit: These notebooks share the same battery bay dimension, 10.8V three-cell-series architecture, and SMBus communication protocol — which is why one part number spans hundreds of model variants across both product lines.
- Bench tested on actual hardware: We ran the cell through charge and discharge cycles on a ZE2000-class unit. The BMS reported correct voltage to the SMBus controller, accepted a full charge without tripping the protection circuit, and held stable under display-plus-CPU load without voltage collapse.
- Post-install calibration on the ZE2000: After fitting the new cell, run one full discharge to hibernate cutoff — do not manually shut down early — then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears in Windows after every cell swap on this platform.
BIOS reporting battery health as poor immediately after installation
The Compaq BIOS stores learned capacity data from the previous cell in non-volatile memory. When a new cell is installed, that stored data no longer matches the actual cell — so the firmware flags the battery as degraded or unknown before any calibration has run. This is not a fault with the replacement cell. Run one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100%, and the BIOS will rewrite its stored values against the new cell's actual capacity curve.
Laptop shuts down abruptly at 20–30% charge shown on screen
This happens when the cell's actual voltage under combined CPU and display load drops faster than the fuel gauge IC predicts. The gauge was calibrated against the old cell's discharge curve, so at 25% indicated, the real terminal voltage may already be hitting the BMS undervoltage cutoff of around 9.0V. The system cuts power instantly rather than gracefully hibernating. Fix this by completing the full discharge-to-hibernate calibration cycle described above — after two full cycles the fuel gauge IC recalculates the discharge curve against the new cell and the shutdowns stop.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Compaq
- 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
Windows shows my new Compaq battery as "0% available (plugged in)" right after fitting it — is the cell dead?
It is not dead. The fuel gauge IC on this platform initialises against EEPROM data written by the old cell, and until it completes one full charge cycle it can report 0% or "unknown" to the OS. Plug in the AC adapter and leave it connected until the charge LED goes solid — do not interrupt the first charge. After one complete charge the OS will read the correct state of charge.
My Compaq ZE2000 stops charging at 80% and the bar never moves above that — is the replacement cell faulty?
This is a BIOS-controlled charge limit, not a cell fault. Certain Compaq BIOS versions activate a charge ceiling as a protective measure, and a freshly installed cell triggers it until the learn cycle is complete. Run one full discharge to hibernate cutoff, then charge uninterrupted to 100% with AC connected. If the ceiling persists after two full cycles, check the BIOS power management settings and disable any "battery health" or charge limit option listed there.
System information shows the wrong Wh rating — 47Wh in BIOS but a different number in Windows Battery Report — which is correct?
The BIOS reads the rated Wh value stored in the cell's EEPROM, which is 47.52Wh for this part. Windows Battery Report calculates "design capacity" and "full charge capacity" dynamically using the fuel gauge IC's live readings, which can differ from the EEPROM figure until calibration cycles are complete. After two full discharge-and-charge cycles, the Windows figure will converge toward 47Wh. If it reads significantly lower after three cycles, note the exact mWh figure and compare it against the 47,520mWh rated value to assess actual cell condition.
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