The CMOS battery price in BD is usually low, but the correct price depends mainly on the battery type, brand, packaging, and where it is sold. Most desktop motherboards use a CR2032 3V lithium coin cell. Laptop batteries can be CR2032 cells, smaller wired lithium packs, or proprietary RTC/CMOS battery assemblies, which may cost more and are not always interchangeable.
Rather than choosing the cheapest listing, first match the code printed on the old battery or confirm the motherboard manual. A low-cost battery that does not fit, has the wrong voltage, or has been stored for years can create more trouble than it saves.
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Typical CMOS battery costs in Bangladesh
For a standard desktop CR2032, the cost is generally modest. Prices can differ substantially between a loose generic cell and an individually packed battery from an established manufacturer. Laptop-specific CMOS or RTC battery packs normally cost more because they may include a cable, connector, insulation, or a custom-shaped holder.
| Battery type | Common use | What affects the price |
|---|---|---|
| CR2032 3V lithium coin cell | Most desktop PC motherboards | Brand, freshness, packaging, and retailer |
| CR2025 or CR2016 coin cell | Some compact devices; less common for desktop CMOS use | Size, brand, and availability |
| Wired RTC/CMOS battery pack | Some laptops and small-form-factor PCs | Connector type, cable, pack design, and compatibility |
| Rechargeable RTC battery or special assembly | Selected older or specialized hardware | Exact device requirement and availability |
Online marketplace prices, computer-shop prices, and electronics-market prices may not match. Delivery charges can also be larger than the cost of one coin cell. If buying online, check whether the listed price is for one battery, a multi-pack, or a battery supplied with a holder or cable.
Which battery does a desktop PC normally need?
Most desktop computers use a CR2032 lithium coin-cell battery rated at 3 volts. It is a round, silver-colored battery about the size of a large coin and usually sits in a circular holder on the motherboard.
Do not assume every round coin cell is a substitute. The letters and numbers matter. “CR” commonly identifies a lithium manganese-dioxide coin cell; “2032” refers to its approximate dimensions: 20 mm diameter and 3.2 mm thickness. A CR2025 may have the same diameter but is thinner, so it may not make reliable contact in a holder made for a CR2032.
How to confirm the right CMOS battery before ordering
Checking the existing part takes only a few minutes and can prevent an incompatible purchase.
- Shut down the computer fully and disconnect it from mains power.
- For a desktop, remove the side panel and locate the coin cell on the motherboard. For a laptop, consult the service manual or have a technician inspect it; access can require significant disassembly.
- Read the code printed on the battery or label. Look for markings such as CR2032, CR2025, or a manufacturer-specific part number.
- Note whether the battery is a bare coin cell in a holder or a shrink-wrapped pack with a wire and connector.
- Match the voltage, physical size, connector, and polarity arrangement exactly when buying a replacement.
Take a clear photo of the old battery and connector before visiting a shop. This is especially helpful for laptops, where an RTC pack can look similar to another pack but use a different plug or wire arrangement.
Why the same battery can have different prices
A coin cell is simple, but its remaining shelf life and build quality matter. The following factors explain most price differences:
- Brand: Recognized battery brands may cost more than unbranded cells.
- Manufacturing and expiry date: A recently manufactured cell with a clear date marking is generally a safer purchase than old, unmarked stock.
- Packaging: Sealed retail packaging can cost more than a loose cell.
- Seller type: Computer repair shops, electronics stores, and online sellers have different overheads and delivery costs.
- Quantity: Multi-packs may reduce the per-cell cost, though buying several is unnecessary unless you have a real use for them.
- Form factor: A wired pack or proprietary laptop assembly is more complex than a bare CR2032.
The lowest price is not always the best value. A drained or counterfeit cell may cause the same symptoms again soon after replacement.
What the CMOS battery actually does
The term “CMOS battery” is commonly used for the small backup battery on a computer motherboard. It supplies tiny standby power to circuitry that retains system settings while the computer is unplugged. On modern PCs, this includes the real-time clock and firmware settings stored or maintained by the motherboard design.
The battery does not power the computer itself. Replacing it will not fix a PC that will not turn on because of a failed power supply, damaged motherboard, bad RAM, or operating-system problem. It is mainly relevant when date, time, or firmware settings keep resetting.
Signs that replacement may be needed
A weak CMOS or RTC battery often causes settings-related symptoms, especially after the computer has been disconnected from electricity for a while. Common signs include:
- The date and time reset or become incorrect repeatedly.
- The computer displays a CMOS checksum, RTC, date/time, or setup-related warning during startup.
- BIOS or UEFI settings return to default values.
- The boot order changes after power has been removed.
- A laptop reports a real-time-clock battery issue.
These signs are clues, not proof. Incorrect time can also result from operating-system settings or internet time synchronization problems. Firmware warnings should be read carefully before concluding that the battery is at fault.
Choosing between generic and branded cells
For a standard CR2032, both generic and branded options may be available. A generic battery can be reasonable from a trusted seller if the marking, voltage, and date information are clear. A branded battery may be a better choice when the price difference is small, when the machine is difficult to open, or when the device will remain unused for long periods.
Look for a clean label, legible battery code, intact packaging where applicable, and a stated voltage of 3V for a CR2032. Avoid damaged, corroded, leaking, or loose cells with no identifiable marking. Do not buy a battery simply because the product title says “CMOS battery”; the part number remains the key compatibility detail.
Buying from a computer shop or online seller
For a desktop CR2032, a nearby computer or electronics shop can be convenient because you can inspect the label and avoid shipping costs. Online ordering can be more useful for wired laptop RTC packs, provided the listing shows the connector clearly and identifies supported device models or the exact replacement part number.
Before paying, ask or check:
- Is it a CR2032, another coin-cell size, or a wired RTC pack?
- Is the stated price for one piece or several pieces?
- Does the battery have clear voltage and type markings?
- For a wired pack, does the connector match the old one exactly?
- Is the item returnable if it is physically different from the listing?
For laptop packs, compatibility matters more than brand name alone. Never force a connector into the motherboard socket. If the plug does not fit easily in the same orientation as the original, stop and recheck the part.
Safe replacement basics
Replacing a desktop coin cell is usually straightforward, but basic care protects the motherboard. Disconnect external power first. Touch a grounded metal part of the computer case before handling internal components to reduce static discharge risk. Note the battery orientation before releasing the retaining clip; in many holders, the positive side marked “+” faces upward, but the holder design should be your guide.
Use a non-metal tool only if necessary, and do not bend the retaining clip aggressively. Insert the new cell in the correct orientation, reassemble the PC, then enter BIOS or UEFI setup if needed to set the clock and restore any custom settings. A laptop may require partial disassembly, so professional service is sensible if the battery is buried under other components.
Common mistakes to avoid
- Replacing the wrong battery: A laptop’s main battery and its RTC battery are different parts.
- Using a different coin-cell thickness: Similar diameter does not guarantee reliable fit.
- Buying old stock: An inexpensive but aged battery may have limited remaining life.
- Assuming every startup error is a CMOS problem: Check the exact message and other hardware symptoms.
- Discarding coin cells carelessly: Keep them away from children and recycle or dispose of them according to local battery-waste guidance.
FAQs
How much is a CMOS battery in Bangladesh?
A standard desktop CMOS battery is typically an inexpensive item, while a laptop-specific wired RTC battery costs more. Because shop pricing, delivery fees, stock age, and brand change, confirm the current price with the seller and verify the exact battery code first.
Is CR2032 the same as a CMOS battery?
CR2032 is a battery type, not a general name for all CMOS batteries. It is the most common type used in desktop PC motherboards, which is why it is often called a CMOS battery.
Can I use a CR2025 instead of a CR2032?
It is not the preferred replacement. Both are 3V lithium coin cells with a 20 mm diameter, but the CR2025 is thinner. Use the exact type specified by the motherboard or printed on the original battery.
Will removing the CMOS battery reset BIOS settings?
It can reset firmware settings on many motherboards after power is removed, but behavior varies by board design. Removing the battery is not a reliable solution for every issue and may erase settings you need, such as boot configuration.
How long does a CMOS battery last?
Its life varies with the battery quality, motherboard design, storage conditions, and whether the computer remains connected to power. Replace it when clear RTC or firmware-setting symptoms appear rather than on a fixed schedule.
Bottom line
The cmos battery price in bd is usually small for a normal CR2032 desktop cell, but the right purchase depends on identification, not the label alone. Read the code on the old battery, match the voltage and physical design, and choose fresh, clearly marked stock from a reliable seller. For a laptop with a wired RTC pack, confirm the connector and part compatibility before ordering.