BTI L11421-1C2 Battery for HP Pavilion 14/15/17 & HP 240/250 G7

The BTI L11421-1C2-BTI is an internal rechargeable replacement laptop battery designed for selected HP laptops using compatible L11421 and HT03XL-family battery configurations. It is intended to replace an ageing, worn or failed compatible battery and restore portable battery operation.

The exact manufacturer part number is L11421-1C2-BTI. Checking the full BTI part number helps distinguish this product from original HP batteries and other aftermarket versions using similar L11421 references.

The EAN for this exact BTI replacement battery is 5059902141897.

The exact BTI replacement is rated at 40Wh with a charge capacity of approximately 3470mAh.

The battery has a nominal voltage of 11.55V. Compatibility should be checked using the original battery reference, laptop model, voltage, connector and physical design rather than voltage alone.

They describe different battery characteristics. Milliamp-hours measure electrical charge capacity, while watt-hours measure stored energy and also take voltage into account. At approximately 11.55V, 3470mAh corresponds closely to the stated 40Wh energy capacity.

The battery uses rechargeable Lithium-Polymer, or Li-Polymer, technology. This type of battery is commonly used in modern laptops because it allows relatively thin internal battery designs.

BTI's specification for the exact L11421-1C2-BTI replacement lists it as a 4-cell battery.

The L11421 and HT03XL family appears in several OEM and aftermarket revisions. Different manufacturers may describe their internal cell construction differently. For this Memox listing, the relevant specification is the exact BTI L11421-1C2-BTI replacement, which BTI lists as a 4-cell, 40Wh, 3470mAh, 11.55V battery.

No. This is a BTI compatible replacement battery. It is manufactured for use with compatible HP laptops but is not an original HP-branded battery.

A compatible replacement is manufactured by a third-party battery specialist to work with specified laptop models and battery references. Compatibility still needs to be confirmed against the laptop and original battery before installation.

Yes. BTI produces compatible replacement batteries and power products for laptops and other devices. This particular product is distributed as the BTI L11421-1C2-BTI replacement battery.

BTI lists the battery for selected laptops across the HP Pavilion 14, Pavilion 15 and Pavilion 17 families, together with selected HP 240 G7 and HP 250 G7 systems. Compatibility must still be checked for the exact laptop configuration.

No. HP Pavilion 14 covers many generations and battery designs. Only selected Pavilion 14 models use the L11421 / HT03XL battery family, so check the exact model and original battery label before purchasing.

No. Pavilion 15 is a very large laptop family covering numerous generations and internal battery designs. Do not order based only on the words “HP Pavilion 15”; confirm the original battery reference first.

No. Only selected Pavilion 17 models use this battery family. The exact laptop product number or existing internal battery reference should be checked before ordering.

Yes, selected HP 250 G7 configurations use this battery family. Because HP produced different 250 G7 configurations, confirm the original battery label or laptop product number before installation.

Yes, selected HP 240 G7 laptops are listed with the L11421 / HT03XL battery family. Checking the existing battery part number remains the most reliable compatibility method.

Selected Pavilion 14-ce configurations use this battery family. However, there are multiple 14-ce variants, so confirm the original battery number rather than relying on the series name alone.

Selected models in the Pavilion 14-cf, 14-ck and 14-cm families are associated with the L11421 / HT03XL battery fitment. Exact model confirmation is still required.

Selected laptops in the Pavilion 15-cs, 15-cu and 15-cw families use compatible L11421 / HT03XL battery configurations. Always compare the original battery reference before ordering.

Selected HP 15-da and HP 15-db configurations use this battery family. Not every notebook in these series necessarily uses the same internal battery, so verify the original part number.

Selected HP 17-by and HP 17-ca models are associated with this battery family. Confirm the existing battery label and laptop product number before purchasing.

Commonly associated battery references include L11421-1C2, L11421-1C1, L11421-2C1, L11421-2C2, L11421-2C3, L11421-2D1, L11421-2D2, L11421-271, L11421-421, L11421-422, L11421-423, L11421-542, L11421-544, L11421-545, L11119-855, HT03XL, HT03041XL, HSTNN-DB8R, HSTNN-DB8S, HSTNN-IB80, HSTNN-IB8O, HSTNN-LB8L and HSTNN-LB8M. Exact physical and laptop compatibility should still be confirmed.

HT03XL is one of the commonly associated HP battery-family references for this fitment. If your original battery shows HT03XL, compare its physical shape, connector, voltage and laptop model with this BTI replacement before ordering.

L11119-855 is commonly associated with the same broad HT03XL/L11421 battery family. Because HP can use several revisions, confirm the laptop model, original battery shape and connector before treating any cross-reference as interchangeable.

HSTNN-IB8O is another battery reference associated with this family. Matching the existing battery code is useful, but the final compatibility check should include the laptop model and physical battery design.

No. L11421 is a broader battery family and includes manufacturing revisions, spare numbers and supplier references. Similar part numbers can also appear with slightly different capacity or cell specifications, so always check the complete fitment rather than only the first part of the number.

The most reliable method is to compare the battery already fitted in the laptop. Check the original battery part number, laptop model, voltage, connector position and physical shape against the replacement information.

The model or product number is normally printed on the underside of the laptop and can also be found in HP Support Assistant, Windows System Information or the BIOS/UEFI. HP product numbers provide a more precise identification than a general series name such as Pavilion 15.

The battery reference is printed on the label of the internal battery. Because this is an internally mounted battery, the laptop base cover may need to be removed to see the label.

You can first identify the complete HP model and product number and compare it with published compatibility information. However, checking the existing battery label provides the strongest confirmation because visually similar HP laptops can use different batteries.

Some compatible HP battery-family revisions are labelled approximately 11.4V while others are labelled 11.55V. A small difference in nominal voltage can exist between compatible battery revisions, but voltage alone should never be used to decide compatibility. Match the battery reference and laptop model as well.

Some original and aftermarket HT03XL-family batteries are labelled around 40–42Wh depending on manufacturer and revision. Compatibility should be based on the correct battery family, voltage, connector, physical fit and laptop model rather than a small difference in rounded Wh capacity.

This is an internal laptop battery. It does not simply slide out from the exterior of the laptop; fitting it generally requires removing the bottom cover.

Many technically experienced users can replace this type of internal battery, but the procedure varies by laptop. If you are not comfortable opening a laptop and handling delicate internal connectors, professional installation is recommended.

Shut Windows down completely, unplug the AC charger, disconnect external devices and follow the service procedure for your exact laptop. Avoid metal tools around exposed battery terminals and do not bend, puncture or crush the battery.

The exact tools vary by laptop, but internal battery replacement commonly requires small precision screwdrivers and a suitable plastic opening tool. Keep the original laptop screws organised because replacement screws are not included unless specifically stated.

Yes. The laptop should be fully shut down and disconnected from its AC charger before the internal battery is removed or installed.

Check that the battery connector is fully seated, reinstall the laptop cover, connect the correct charger and start the laptop. Confirm that Windows or the HP diagnostics system detects the battery and that the laptop can operate on battery power.

No. Modern Lithium-Polymer batteries do not require repeated deep discharge cycles before normal use. You can charge the replacement battery normally after installation.

Calibration is not always necessary, but it can help if Windows or HP diagnostics reports an inaccurate charge percentage or specifically recommends calibration. Calibration is used to improve the accuracy of the displayed battery gauge rather than increase the battery's physical capacity.

HP PC Hardware Diagnostics or HP Support Assistant may offer a battery calibration procedure on supported laptops. Follow HP's instructions for your exact system. Calibration can take several hours because the system may need to charge and discharge the battery to establish accurate full and empty reference points.

HP Support Assistant and HP PC Hardware Diagnostics can test compatible notebook batteries. Results may indicate that the battery passed, needs calibration, is weak, should be replaced or is not detected.

You can create a Windows battery report by opening Command Prompt or Terminal and running powercfg /batteryreport. The report can help you compare design capacity with current full-charge capacity and review recent battery usage.

Design capacity represents the amount of energy the battery was designed to hold, while full-charge capacity represents the amount Windows currently estimates it can hold. As rechargeable batteries age, full-charge capacity normally decreases.

Sudden percentage changes can be caused by battery-gauge calibration, BIOS reporting, Windows power management or a connection problem. Allow the system to complete several normal charge/use cycles and run HP battery diagnostics if the reading remains inaccurate.

First check that the battery connector is fully seated and that the battery is correct for the laptop. HP also recommends troubleshooting steps such as performing a power reset, restoring BIOS defaults where appropriate, updating the BIOS and testing whether the laptop can start on battery power.

Turn the laptop off, disconnect the AC adapter and unnecessary peripherals, then hold the power button for approximately 15–25 seconds before reconnecting power. Exact procedures vary by HP model, so follow HP's instructions for your notebook.

Potentially. HP includes BIOS updates and BIOS-default restoration among its troubleshooting steps for batteries that are not detected. Only install BIOS firmware intended for your exact HP product number and follow HP's update instructions carefully.

Possible causes include battery-protection settings, calibration, a charger problem, a loose battery connector, BIOS or firmware behaviour, Windows power management or a fault in the laptop's charging circuitry. The battery itself is not always the cause.

Yes. A damaged charger, incorrect HP adapter or charging-port problem can prevent the battery charging correctly even when the battery itself is working. Confirm that the laptop operates normally from the correct AC adapter.

Only if the original battery is the cause. A laptop that does not power on can also have problems with the charger, charging port, motherboard, power circuit, RAM, BIOS or internal connections.

It may if the shutdowns are caused by a worn battery that can no longer maintain voltage under load. Random shutdowns can also result from overheating, motherboard faults, charger problems or software issues, so diagnosis may be required.

This is a common symptom of a heavily degraded, disconnected or failed battery. However, if the same problem continues after a known-compatible replacement is installed, check the battery connector, BIOS detection and laptop charging circuitry.

There is no fixed runtime because battery life depends on screen brightness, processor load, Wi-Fi, Bluetooth, background applications, video playback, storage activity, Windows power settings and the condition of the laptop. The battery provides 40Wh of rated energy, but the laptop determines how quickly that energy is consumed.

It can restore lost capacity when the old battery is significantly degraded, but exact runtime may not match the laptop when it was brand new. Operating-system changes, component ageing, application workload and power settings can all affect current power consumption.

Common signs include very short runtime, rapid percentage drops, unexpected shutdowns, failure to charge fully, Windows or HP battery warnings, the laptop turning off when AC power is removed or visible battery swelling.

Stop using the laptop and disconnect it from AC power. Do not puncture, bend, press, crush or attempt to repair the swollen battery. Arrange safe replacement and appropriate battery recycling.

Yes. As a battery expands it can place pressure on the bottom cover, keyboard, touchpad and other internal components. HP recommends discontinuing use of a laptop with a swollen battery until the battery is replaced.

No. HP recommends discontinuing use when battery swelling or deformation is noticed and disconnecting the notebook from AC power until the battery can be replaced.

Do not place a Lithium-Polymer laptop battery in normal household waste. Use an appropriate battery recycling or electrical-waste collection service and follow local battery-disposal requirements.

Yes. Normal laptop use while charging is generally fine. After first installation, it can be useful to confirm that the battery is charging properly and that the laptop continues running when the charger is disconnected.

Modern laptops manage battery charging automatically, but long periods at high charge and high temperature can accelerate battery ageing. Some HP systems provide Battery Health Manager or similar features that can reduce the maximum charge level when the laptop remains connected to AC power most of the time.

Some HP notebooks support battery-health features that intentionally limit maximum charge to around 80% to reduce long-term battery wear. Check HP Battery Health Manager, BIOS or HP power-management settings before assuming the replacement battery is faulty.

Keep the laptop cool, avoid frequent deep discharges, use sensible Windows power settings, reduce unnecessary screen brightness, keep vents clear and avoid leaving the laptop in very hot locations such as a parked vehicle. Heat is an important factor in rechargeable battery ageing.

Yes. Store it in a cool, dry place away from heat, sunlight, moisture and conductive metal objects. Avoid leaving rechargeable laptop batteries fully discharged for long periods.

This battery is not suitable for every HP Pavilion 14, 15 or 17 laptop and should not be purchased solely because the laptop carries one of those family names. It is also not suitable where the original battery uses a different physical design, connector, voltage or battery family. Always verify the exact laptop and battery part number before ordering.

The exact L11421-1C2-BTI replacement is supplied with an 18-month limited BTI warranty, subject to the manufacturer's applicable warranty terms.

The package contains 1 x BTI L11421-1C2 compatible internal laptop battery. A laptop, charger, installation tools and other accessories are not included unless explicitly stated separately.