HP Compaq 2533t Replacement Battery 10.8V 6600mAh
This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.
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HP Compaq 2533t Replacement Battery 10.8V 6600mAh - 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.
HP Compaq 2533t Replacement Battery 10.8V 6600mAh - is backordered and will ship as soon as it is back in stock.
Voltage
10.8V
Amp
6600mAh
HP EliteBook 2530p / 2533t / 2540p — 10.8V Li-ion Replacement Battery (412789-001)
This is a 10.8V, 6600mAh (71.28Wh) Li-ion battery for the HP EliteBook 2530p, 2533t, 2540p, and the HP Compaq 2533t notebook. It replaces OEM part numbers 412789-001, HSTNN-XB21, HSTNN-XB22, HSTNN-XB23, BJ803AA, and MS06XL. Fits the standard battery bay — no tools required beyond a flat-head or coin to release the latch.
- EliteBook 2530p, 2533t, and 2540p compatibility: These three ultraportable business models share the same battery bay dimensions, connector pinout, and BMS handshake protocol. All three pull from the same 10.8V rail and use the same latch-release mechanism, which is why one cell services all of them.
- Bench tested on actual hardware: We ran this cell on a 2530p and a 2540p. The BMS initialised cleanly on both, Windows reported the battery as present immediately, and the charge cycle completed without the controller tripping a fault or capping at 80% from a cold start.
- Post-install discharge cycle on HP EliteBook: After fitting this cell, run the laptop on battery from full charge down to hibernate cutoff — do not interrupt the discharge. Then charge uninterrupted to 100%. This forces the HP BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after any cell swap.
Why the EliteBook 2540p shuts down at 20–30% after a battery swap
The 2540p's EC (embedded controller) uses voltage-curve data stored from the previous cell to predict remaining capacity. A new cell has a different internal resistance profile, so the EC misreads the voltage cliff and triggers shutdown early. The fix is not a BIOS update — it is a calibration cycle. Discharge fully to hibernate, charge to 100% without interruption, and repeat once more. After two full cycles the EC re-maps the curve against the new cell and the premature shutdowns stop.
BIOS reporting battery health as "poor" or "unknown" immediately after fitting a new cell
The HP BIOS reads health data from the battery's EEPROM, which carries rated-cycle and age data from the original cell at manufacture. A replacement cell arrives with EEPROM values the BIOS interprets as degraded relative to its internal baseline. This is a data-mismatch warning, not a fault with the new cell. Run the battery learn cycle — full discharge to hibernate, then full uninterrupted charge to 100% — and the BIOS health indicator will update to reflect the actual state of the new cell.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: HP
- 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 HP EliteBook 2530p fuel gauge jumps around for the first few charges — is the battery faulty?
The fuel gauge IC on the 2530p needs two to three full charge-discharge cycles to calibrate against the new cell's chemistry. Until that happens, the percentage readout is extrapolated from the old cell's data and will appear erratic or skip values. Run two complete discharge-to-hibernate, then charge-to-100% cycles without interruption. After the second cycle the gauge stabilises and tracks accurately.
Windows is showing the wrong Wh rating for this battery — it says 47Wh but the cell is rated 71.28Wh.
The Wh figure Windows displays pulls from the battery's EEPROM, which stores a rated design-capacity value set at manufacture. If the EEPROM value does not match the actual cell chemistry in the replacement pack, Windows will report the old figure. This is an EEPROM read — not a measurement of the actual cell. Run the HP BIOS battery learn cycle (full discharge to hibernate, full charge to 100%) and check Device Manager under Batteries — the reported design capacity will update once the BIOS has completed a full learn pass.
The HP EliteBook 2540p charged to 100% once, but now it stops charging at 80% every time — why?
The HP BIOS on the 2540p includes a battery care charge limit that caps charging at 80% when the setting is enabled — this is a firmware control, not a cell fault. Open HP Support Assistant or the BIOS power settings (F10 at boot → Power) and check for a "Battery Care Function" or "Optimised Battery Charging" toggle. Disable it, plug in, and the charge will proceed to 100%.
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