Faced with constant time reset, loading errors, or a requirement to click F1 to continue? Most likely on your laptop HP battery is dead BIOS (aka CMOS battery). This tiny part is responsible for saving system settings, including date, time and boot options. When it runs out, the laptop begins to “forget” the configuration, which leads to failures.

In this article you will find detailed instructions for replacing the BIOS battery on laptops HP different series - from budget Pavilion to gaming Omen. We will look at how to determine the malfunction, choose the right battery, remove the back cover and avoid common mistakes. We will also answer the questions: what to do if the laptop does not turn on after replacement, and how to reset the BIOS to factory settings.

How to understand that the BIOS battery is dead: 5 key symptoms

Before disassembling the laptop, make sure that the problem is with the battery. Here main features her category:

  • ⏰ The date and time are reset every time you turn it on (for example, 2010 or 00:00 is displayed).
  • 🔄Laptop requires pressing F1 or F2 to continue downloading with a message CMOS Checksum Error.
  • 🖥️ B BIOS Setup Boot settings are lost (for example, hard drive priority is lost).
  • 🔌 Laptop doesn't turn on the first time or it loads only after several attempts.
  • 🔍 Errors like Real Time Clock Error or System Battery Voltage Low.

If any of these symptoms occur, there may be a problem with the battery. BIOS is 90%. However, similar errors can also cause other malfunctions - for example, damage to the microcircuit CMOS or problems with the motherboard. To eliminate them, try reset BIOS (we'll talk about this below).

⚠️ Attention: On laptops HP EliteBook And ProBook series 800/1000 BIOS reset may brick device due to built-in security HP Sure Start. In this case, an official unlocking utility is required.
📊 How often do you encounter BIOS problems?
  • Never
  • Once every few years
  • Regularly (once a year)
  • I don't know what BIOS is

What kind of battery is needed for an HP laptop: types and characteristics

In 95% of laptops HP standard is used lithium battery CR2032 voltage 3 V. However, in some models (especially thin ones, like HP Spectre or Envy) can stand:

  • 🔋 CR2026 - 0.7 mm thinner, but with the same capacity.
  • 🔋 CR1220 - found in ultrabooks (for example, HP Elite Dragonfly).
  • 🔋 ML2032 — rechargeable analogue (not recommended for BIOS!).

To accurately determine the model, find the battery on the motherboard (usually it is located next to the chip BIOS or under the RAM slot). It will be marked. If you don’t want to disassemble your laptop, check the technical documentation on the website HP by model number (located on the sticker below).

HP laptop model BIOS battery type Replacement features
Pavilion 15/17, Laptop 15s CR2032 Easy access, battery under RAM cover
EliteBook 840/850, ProBook 440/450 CR2032 Requires removal of keyboard or bottom cover
Omen 15/17, Victus CR2032 The battery may be soldered (rarely)
Spectre x360, Envy 13 CR2026 or CR1220 Difficult parsing, risk of cable damage

In HP EliteBook G8/G9 and ZBook series laptops, the battery can be soldered into the board. In this case, replacement requires soldering or contacting service.

Preparing for replacement: tools and safety precautions

To replace the battery BIOS you will need:

  • 🔧 Plastic pick or a guitar pick (to release the latches).
  • ⚒️ Phillips screwdriver (usually PH00 or PH0).
  • 🧲 Magnetic mat or a container for screws (so as not to lose).
  • 🔋 New battery (check the voltage with a multimeter before installation!).
  • 📸 Smartphone for photographing the location of cables and screws.

Mandatory safety measures:

  1. Unplug your laptop and remove the battery (if it is removable).
  2. Work for antistatic mat or ground yourself (touch a metal object).
  3. Do not touch battery contacts or microcircuits bare hands - use gloves or grab the edges.
⚠️ Attention: In laptops HP with aluminum housing (eg Spectre) screws can be of different lengths. By mixing them up, you risk damaging the motherboard!

Take photos of the location of the screws and cables|

Turn off the power and remove the battery|

Prepare your work area (lighting, tools)|

Check the new battery with a multimeter (should be 3.0–3.3 V) -->

Step-by-step instructions: how to replace the BIOS battery on an HP laptop

The replacement process depends on the laptop model. We will consider two most common options: with access through the bottom cover and with disassembly of the keyboard.

Option 1: Battery under removable cover (Pavilion, Laptop 15, Omen)

This method is suitable for most budget and gaming laptops HP.

  1. Turn the laptop over and disconnect the battery (if it is removable).
  2. Unscrew the screws cover under which the RAM is located (usually marked with a RAM).
  3. Carefully pry off the lid plastic pick and remove it.
  4. Find the battery — it looks like a round metal “tablet” in a holder.
  5. Remove the old batteryby lightly pressing the holder latch.
  6. Install a new one battery plus up (there is a mark on it +).
  7. Assemble your laptop in reverse order.
💡

If the battery is “stuck” to the holder, do not try to tear it out - carefully pry it out from the side with a flat-head screwdriver.

Option 2: Battery under the keyboard (EliteBook, ProBook, Envy)

On business laptops HP The battery is often hidden under the keyboard. It's important here do not damage the cables!

  1. Remove the bottom cover laptop (unscrew all screws, including those hidden under the rubber feet).
  2. Disconnect the battery (if it is non-removable, disconnect the cable from the motherboard).
  3. Gently lift up the keyboard using a plastic mediator. Start from the top (above F1–F12).
  4. Disconnect the keyboard cable (usually it is secured with a latch - lift it up).
  5. Find the battery - it can be under a metal screen or next to the cooler.
  6. Replace the battery (same as the first option).
  7. Assemble your laptop, making sure that all cables are connected tightly.

Video instructions for specific models:

💡

If after replacing the laptop does not turn on, check the connections of the keyboard cable and battery. Often the problem lies in a loose contact, not in the battery.

What to do after replacement: BIOS setup and possible errors

After installing a new battery BIOS will be reset to factory settings. You will need:

  1. Go to BIOS (click F10, Esc or Del when loading).
  2. Restore date and time in section Main or System Information.
  3. Customize boot order (Boot Order), if the laptop does not see the hard drive.
  4. Activate virtualization (Virtualization Technology) in section System Configuration, if you use virtual machines.
  5. Save settings (F10 → Yes).

Typical errors after replacement and their solutions:

Problem Reason Solution
Laptop won't turn on Unconnected cable or battery Disassemble and check all connections
Error Secure Boot Violation Reset Security Settings Disable Secure Boot in BIOS
Touchpad/keyboard doesn't work The cable was damaged during assembly Check the cable connections
Laptop turns off after 5 seconds Short circuit or wrong battery Check battery polarity and contacts

If after replacement an error appears HP Sure Start Authentication Failed, this means that the protection against unauthorized access has been activated. In this case:

  1. Connect your laptop to the Internet via Ethernet.
  2. Boot into BIOS and select Restore Security.
  3. Follow the instructions on the screen (you will need a recovery code, which can be obtained from the website HP).
What should I do if my laptop asks for a BIOS password after replacing the battery?

If you have not set a password, try the standard HP combinations: admin, 12345 or leave the field blank. If the password was previously set, a reset via a jumper on the motherboard will be required (CLR_CMOS) or contacting service.

How to extend the life of a new BIOS battery: 5 tips

Average lithium battery life CR2032 — 5–10 years. But if used incorrectly, it can shrink within 2-3 years. To avoid this:

  • 🔌 Don't leave your laptop connected to the network all the time - periodically operate on battery power.
  • 🌡️ Avoid overheating (clean the cooling system once a year).
  • ⚡ Do not use your laptop if the battery level is below 10% - this increases the load on CMOS.
  • 🔄 Update your BIOS only if necessary (each update resets settings).
  • 🛠️ Keep your laptop in a dry place — Humidity accelerates corrosion of battery contacts.

Myths about the BIOS battery:

  • ❌ “Frequent replacement harms the motherboard” - no, if you do it carefully.
  • ❌ “You can use a rechargeable battery” — it's impossible, since the voltage ML2032 unstable.
  • ❌ “The battery only drains from time to time” - in fact, its discharge is accelerated by frequent BIOS resets and high temperatures.

FAQ: Frequently asked questions about replacing the BIOS battery on HP

Is it possible to replace the BIOS battery without disassembling the laptop?

No, on laptops HP The battery is always located inside the case. The only option without disassembly is to contact a service center, but this will cost more than replacing it yourself.

What happens if you put the battery on the wrong side?

The laptop will not turn on or the battery will drain quickly. Worst case possible short circuitwhich will damage the motherboard. Always check polarity: + should be on top.

How much does it cost to replace a BIOS battery in a service?

In official services HP the price varies from 1,500 to 3,000 rubles (including labor). In unofficial workshops - from 800 rubles. Replacing it yourself will cost 50–200 rubles (the cost of the battery CR2032).

Can I use a watch battery?

Technically yes, if it is CR2032 with tension 3 V. However, watch batteries are often of lower quality and will last less. It is better to buy specialized batteries for motherboards (for example, Maxell or Panasonic).

How to reset BIOS without replacing the battery?

On most laptops HP there is a jumper CLR_CMOS (usually next to the battery). To reset the BIOS:

  1. Turn off the power and remove the battery.
  2. Move the jumper from the contacts 1-2 on 2-3 for 10 seconds.
  3. Return the jumper to its original position.

If there is no jumper, disconnect the battery for 1-2 minutes.