Every electronic device has a special battery that keeps track of important settings - the CMOS battery. This tiny power source ensures your computer's date and time stay accurate and preserves crucial system settings. In this roundup, we'll compare the top CMOS batteries available today, helping you choose the right replacement for your equipment.
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These small 3V CMOS batteries from EEMB come with handy wire leads and a Molex connector, making them a practical choice for computer replacements. The batteries have passed rigorous safety tests certified by TUV and UL, giving you peace of mind. With over 400 UL-certified battery models in their lineup, EEMB has established a strong reputation in the industry.
Made from durable plastic with gold-plated contacts, this replacement battery reliably powers your Asus Eee PC for up to 10 years. The premium lithium-ion cell passes rigorous testing to ensure it performs well in any environment. Replacing the original OEM battery is easy – the 2-pin design makes installation quick and straightforward.
Built to last twice as long as regular dry batteries, these tiny powerhouses deliver a full 3 volts with remarkable consistency. The ultra-thin design packs a serious energy punch without adding any weight, making it perfect for keeping your computer's clock and settings running smoothly. Inside, a safe poly-carbon monofluoride material ensures reliable performance for years to come.
This genuine Lenovo ThinkPad X1 Carbon 6th Gen battery keeps your clock running smoothly when your laptop is off, making sure important system settings stay fresh and accurate. The CR2016 lithium cell fits perfectly in your laptop's motherboard, providing the stable power needed for the real-time clock (RTC) to maintain timekeeping even during power outages. The original equipment status ensures reliable performance and compatibility with yourLenovo system.
The Rome Tech CMOS battery brings reliable power to your Lenovo ThinkPad Yoga 11e for up to 10 years, with premium lithium-ion technology that outperforms generic alternatives. Designed with safety features like overcharge protection and a protective shell, it's a straightforward upgrade that requires just basic computer knowledge to install. With robust performance and EU certified quality, this replacement battery keeps your laptop's BIOS running strong for years to come.
These Swiss-made silver oxide batteries deliver consistent performance across a wide range of applications, from watches and calculators to car keyless remotes and computer backup systems. Formally known as SR516SW, these 317 batteries maintain their capacity over time thanks to their low self-discharge rate, while their superior leakage resistance ensures reliable power delivery for your electronic devices.
When it comes to keeping your Lenovo ThinkPad T60 running smoothly, the built-in CMOS battery plays a crucial role - and this high-quality replacement from Rome Tech delivers exactly what you'd expect from the best lithium-ion batteries available. With protection against overcharging and a sturdy protective shell, it's designed to last through countless boot cycles while keeping your system's clock and BIOS settings running strong. The fact that it works with everything from laptops to industrial equipment speaks volumes about its versatility and reliability as a backup power source.
Cameron Sino delivers top-notch replacement batteries that meet original equipment specifications. These reliable 550mAh lithium cells provide 1.65Wh of power in a compact 33.90 x 24.80 x 6.60mm package. With ISO 9001 manufacturing standards in place, you can expect these backup batteries to last through hundreds of charges.
The DieHard 41-1292 SR393 battery brings reliable power to your electronic devices without mercury, making it a safe choice for powering essential gear like medical equipment and watches. Its silver oxide chemistry delivers consistent performance over time, helping small electronics and key fobs maintain their functionality for years to come.
These reliable coin batteries deliver consistent performance in your electronic devices, thanks to their high energy density and excellent temperature resistance. With notable durability and leak-proof design, they've become a trusted choice for watches and other small electronics that require precise timing.
Featuring reliable protection against overcharge and short circuits, the 3.7V LiPo battery delivers consistent performance with its 260mAh capacity. The compact 6.5 x 17.5 x 32mm design makes it ideal for portable devices like Bluetooth speakers and smart home gadgets, while UL certification ensures safe operation. The JST connector requires polarity matching to prevent damage, so pay careful attention to your device's specifications when making a connection.
This spare battery keeps your system's clock and settings running smoothly when the main power is off, fitting neatly into CR2032 sockets on boards like the ODROID-N2-Plus and standard PC motherboards. With no expiration date for electronic memory protection, you can count on it for reliable timekeeping without hassle.
These small button-cell batteries pack a powerful 3V punch, making them perfect for keeping your watches, calculators, and other low-power devices running smoothly. The convenient 2-pack format means you'll always have spare batteries on hand for your essential gadgets. Just remember to keep them out of reach of children and pets since they can be harmful if swallowed.
These handy little batteries are perfect for keeping your gadgets powered up, with their special lithium chemistry giving you loads of reliable juice for your tech toys. The best part? They last way longer than regular batteries, so you won't need to change them for years - ideal for those hard-to-reach watch batteries or your underwater camera.
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These 50 CR2032 batteries offer reliable power for small electronics with their 3V output and three-year leak-free shelf life. Made with Super Cell Technology and manufactured fresh monthly, they're ideal for keeping your watches, calculators, and key fobs running smoothly. The compact 3-gram cells provide 220 amp hours of energy, making them a practical choice for powering thousands of electronic devices.
These 3V lithium batteries deliver consistent performance across various applications, from car key fobs to electronic devices. The compact design fits perfectly in small spaces like watch backs, while the long shelf life ensures you won't need to replace them for years. Most users find them reliable for their electronic needs, though some may need to explore other brands for specific applications like key remotes.
Buyer's Guide
Cmos batteries are essential components in electronic devices, maintaining time and date settings when other power sources are depleted. Understanding their specifications and applications ensures optimal device performance and longevity.
Key Specifications
Cmos batteries typically operate between 3.0V and 3.6V, with capacities ranging from 20mAh to 150mAh depending on the device's power requirements. Their primary characteristic is very low self-discharge rates, often less than 3% per year, making them reliable long-term power sources.
Application Requirements
These batteries power the real-time clock and non-volatile memory in computers, smartphones, and embedded systems. They must fit within specific voltage and current constraints of the device's motherboard or circuit board.
Power Consumption Factors
The current draw from cmos batteries varies significantly based on device architecture. Modern low-power designs consume approximately 10-20µA, while older systems might require up to 100µA. Understanding these consumption patterns helps in selecting compatible backup power solutions.
Installation and Compatibility
Proper installation requires careful attention to polarity and physical alignment with the device's socket or holder. Modern notebooks and motherboards often feature dedicated cmos battery slots, while some older systems rely on surface-mount technology. Careful handling and adherence to manufacturer guidelines prevent damage during installation.
FAQ
What is a CMOS battery?
CMOS batteries, also known as Real-time Clock (RTC) batteries, are small, coin-shaped rechargeable batteries commonly found in electronic devices that need to maintain internal clock and memory functions when the main power is off.
These batteries are crucial for maintaining the system time and BIOS settings in computers, powering up electronic devices in the event of a power outage, and keeping time in watches and other small devices.
How long do CMOS batteries typically last?
CMOS batteries usually have a lifespan of 3 to 5 years under normal operating conditions. Signs that your battery is failing include incorrect system time, lost BIOS settings, or device failure to start.
It's important to replace CMOS batteries before they fail completely to prevent data loss and system malfunctions. Regular monitoring of the battery's condition, especially if you notice changes in system behavior, can help prevent unexpected issues.
What are the signs that a CMOS battery needs replacement?
Common indicators that your CMOS battery needs replacement include system time errors, missing BIOS settings, and frequent system crashes. The battery may also show physical signs of wear, such as swelling or discoloration.
Regular system checks can help identify problems early. If your computer or device has unexpected power loss or fails to maintain time, the CMOS battery may be the culprit.
How do you replace a CMOS battery?
Replacing a CMOS battery typically requires removing the system case and carefully disassembling the motherboard or device. Specific steps vary by manufacturer, so consult your device's manual for precise instructions.
After locating the battery, follow the manufacturer's guidelines to remove and install the new battery. Reassemble the device and verify the system time and BIOS settings to ensure the replacement was successful.
Can a CMOS battery be reused?
CMOS batteries are designed for one-time use and typically cannot be recharged. Attempting to recharge them can damage the battery and potentially harm your device's electrical systems.
The best practice is to replace the battery when it shows signs of failure or reaches the end of its expected lifespan to maintain reliable system operation.
What are the risks of using an outdated CMOS battery?
Using an outdated CMOS battery can lead to system time inaccuracies, lost BIOS settings, and unreliable system performance. In extreme cases, a failing battery can cause system crashes and data corruption.
While modern devices may compensate for some battery issues, maintaining a healthy CMOS battery is crucial for consistent system operation and data protection.
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