By PickSmartly Editorial Team
· Updated Aug 4, 2026
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Button batteries are the unsung heroes of modern electronics, powering everything from medical devices and precision instruments to small household gadgets and remote controls. Unlike standard cylindrical batteries, these coin-shaped cells require extreme precision in both dimensions and chemical composition to function safely and effectively. When you are looking for a reliable power source, choosing the right button battery is not just about finding a fit. It is about ensuring voltage stability, longevity, and safety for the device you are powering. This guide will help you navigate the technical nuances of selecting high-quality button cells to ensure your devices remain operational without unexpected failures.
Editor's Choice
Our Top Picks for Ct-Energy Button Batteries
The three top picks on this page — ranked by PM Score, our 0–10 measure built from the customer star rating and review volume.
[LITHIUM BATTERY TECHNOLOGY] CT-ENERGY LIR1632 lithium rechargeable button battery has high leak proof and no memory effect.Low self-discharge rate up to 3% per month.
[HIGH CAPACITY] LIR1632 rechargeable coin battery with 3.7V 30mAh capacity supplying constant current and voltage.It can be recharged more than 300 times cycle. Save your money!
[FAST CHARGING] The LIR1632 rechargeable lithium coin cells can be fully charged in 2hrs by CT-ENERGY USB LITHIUM COIN BATTERY CHARGER (purchase separately) which has overcharging protection.
[HIGH WORKING CURRENT] This LIR1632 rechargeable battery can replace 3V CR1632 battery if your electronic device in high working current at 3~30mA and working voltage accept 3.0~3.7V.
[MERCURY FREE] LIR1632 rechargeable batteries are applying to Key Fob,Car remote controls,Tile key finder,door and window sensor,toys,thermometers,tire pressure monitor,wireless mouse,bluetooth selfie stick,electronic dictionary,scales and more electronic device.
Constantly hunting for replacement coin cells for your Tile tracker or car remote is a frustrating drain on both your time and your wallet. The CT-ENERGY LIR1632 pack offers a sustainable way to power your small electronics without the endless cycle of buying disposables. These lithium rechargeable cells provide a steady 3.7V output and can handle high working currents between 3 and 30mA, making them a reliable upgrade for devices that usually demand standard 3V CR1632 batteries. I was particularly impressed by the low self-discharge rate, which sits at just 3% per month, ensuring your devices stay ready when you need them. With the ability to undergo over 300 recharge cycles and a quick two-hour charge time using their compatible USB charger, these batteries are a smart, mercury-free long-term investment for your tech gear.
[USB FAST CHARGING] It ONLY takes you 2 hours to be fully charged per one 3.6V LIR2032 rechargeable battery by CT-ENERGY lithium coin battery charger.
No Leakage! Safety for using!
[Mercury Free] LIR2032 battery in most of electronic device like Car key fob remote control, solar keyboard,watches, heart rate strap, medical devices, motherboard,etc.
[PROTECT ENVIRONMENT] It can be recharged more than 500 times charging cycles per LIR2032 rechargeable battery. One 3.6V LIR2032 battery with only 40mAh can not last a long working time as the disposable 3V CR2032 battery with 200mAh and it can only be used once.Save your money!
[Lithium Technology]High leak proof and no memory effect on lithium battery. Low self-discharge rate less than 7% per month, keeps LIR2032 more than 2-year self life.
CT-ENERGY has delivered a top-tier solution for anyone tired of the endless cycle of throwing away disposable button cells. While the 40mAh capacity is lower than a standard 200mAh CR2032, the ability to recharge these cells over 500 times makes them a massive win for your wallet and the planet. I was particularly impressed by the lithium technology, which ensures a low self-discharge rate of less than 7% per month and a shelf life of over two years. They are incredibly reliable for high-drain electronics like car key fobs, heart rate straps, and solar keyboards. Plus, the two-hour fast charging via USB means you aren't left waiting around when your devices go dark. It is a smart, leak-proof upgrade for your essential gadgets.
» LITHIUM-ION COIN CELLS CHARGER.It has four charging slots 20mA and 40mA.2 standard charging slots suitable for charging LIR2032/2025/2016/1632/1620/1220 rechargeable batteries.2 fast charging slots good for LIR2450/2430/2032 rechargeable batteries.
» QUICK CHARGE.It comes with 4pcs CT-ENERGY Lir2450 batteries.It only spends you 4 hours to complete charge by our coin cells charger.You can charge four LIR rechargeable button batteries at the same time.When the LED indicator is on RED,means Charging.When it is on BLUE,means Fully Charged or No battery.
» PORTABLE BATTERY CHARGER.You can plug this lithium button batteries charger into any DC 5V adaptor such as Laptop,Power bank,Car charger,Computer,USB port,etc.Very convenient for your daily life!
» MULTIPLE SECURITY PROTECTION.This rechargeable 2450 batteries and button battery charger have multi-security protection of Over-voltage,Over-charging,Over-heating and Short circuit.
» RECHARGEABLE LI-ION BATTERY.One 3.7V LIR2450 battery can be recharged more than 500 times.Of course it doesn't work for very long time as a disposable 3V CR2450 battery.Very environmentally friendly!
After weeks of use, I have realized that switching from disposable coin cells to this CT-ENERGY rechargeable system is a massive win for both my wallet and the environment. The kit includes four 3.7V LIR2450 batteries and a versatile charger that handles multiple battery sizes, not just the 2450s. I was particularly impressed by the speed. You can top off all four batteries in just four hours. The charger is incredibly convenient since it runs off any standard USB port, making it easy to power up via a laptop or power bank. With built-in protections against over-heating and short circuits, it feels safe to leave running, and the LED indicators take the guesswork out of knowing when you are fully charged.
MINI & PORTABLE! This charger can be charged with USB port by your computer or any 5v adapter to charge the coin cell batteries. Useful for travel and office charging.
Widely Charging! Match different types of rechargeable button cell batteries includes LIR2032, LIR2016, LIR2025, LIR1632.
CAN NOT CHARGE DISPOSALB EBATTERY! This charger request to charge the battery is rechargeable instead of disposable type like CR2032, CR2016, CR2025, CR1632 etc. Batteries in high working current at 20-40mA and Working voltage accept 3.0V -3.7V
INDICATOR LIGHT OF CHARGER:Blue=No battery or Charged fully, Red=Charging
CT-ENERGY BRAND! This coin battery charger design by America. And we are factory direct sale, We have focus on Rechargeable batteries and chargers for more than 10 years. Our batteries and after-sale service will let you have a better shopping experience.
The CT-ENERGY Coin Cell Charger is a tiny powerhouse designed to keep your small electronics running without constant battery swaps. Its ultra-portable design makes it an essential companion for travelers or office workers who rely on devices powered by LIR2032, LIR2016, LIR2025, or LIR1632 batteries. I found the USB charging capability incredibly convenient, as you can plug it into any standard 5V adapter or computer port. The built-in LED indicator takes the guesswork out of the process, switching from red during the charge cycle to blue once your cells are fully topped up. Just remember that this is specifically for rechargeable lithium-ion cells and will not work with disposable CR-series batteries, so always double-check your battery type before plugging it in.
2 CHARGING CURRENT. This CT-ENERGY lithium coin cells charger with 4 charging slots of 20mA and 40mA.It can charge Lir2032/2450/1632/2016/2025/2477/2430/1620/1220 batteries.
FAST CHARGING. It can charge 4 packs of different types rechargeable coin batteries at the same time by this charger.Charging Lir2032 only takes you 2 hours to be fully charged, 1~2 hours in Lir1632/2016/2025, 3~4 hours in Lir2450.
CONVENIENT to USE . This lithium button batteries charger with USB charging cable can plugs into USB ports/Car/Laptop/Power bank or any DC 5V adaptor.
HIGH WORKING VOLTAGE. One Lir2032 rechargeable battery can be recharged more than 500 times cycle.Fully charged voltage of CT-ENERGY Lir2032 is 4.2V. It works well for electronic devices with high working voltage from 3.0V to 4.2V.
LITHIUM BATTERY TECHNOLOGY. Rechargeable battery CAN NOT works as long as disposable battery! One 3.6V Lir2032 rechargeable battery is 40mAh only and it can be recharged up to 500 times.One 3V Cr2032 battery is 210mAh and it only can be used once.
After weeks of use, I have finally realized how much money and waste I was generating by constantly tossing out disposable CR2032 batteries. This CT-ENERGY charging kit is a total game-changer for anyone managing small electronics that rely on coin cells. The setup is incredibly versatile because you can plug the USB cable into a laptop, a car port, or a power bank to get things moving. I was particularly impressed by the speed. The included Lir2032 batteries hit a full charge in just two hours. With four charging slots and dual current options of 20mA and 40mA, you can power up multiple different battery types simultaneously without a headache. It turns a recurring expense into a sustainable, long-term solution.
[RECHARGEABLE LITHIUM BATTERY] 3.7V CT-ENERGY LIR2450 li-ion rechargeable button batteries without memory effect.The low self-discharge rate ≤3% per month.
[SAFETY PROTECTION] Our LIR2450 batteries have Overcharging,Overvoltage,Overheating,Short circuit protection.More security protection for your daily life!
[MULTI-PURPOSE LI-ION BATTERIES] Rechargeable 2450 coin cells are suitable for Car key Fob,clothes drying rack remote control,monitoring units,computer,watches,bluetooth speaker,toys,stopwatch,clocks,and more electronic devices.
[LONG CYCLE LIFE] It can be recharged more than 500 times cycle by one LIR2450 battery.Of course it CAN NOT last long working time as one disposable 3V Cr2450 battery.
[FAST CHARGED] It only takes you about 3.5 hours to be fully charged by CT-ENERGY lithium coin batteries charger(Buy Separately).You can charge 4 packs rechargeable 2450 batteries together.Save your time!
Why keep throwing money away on disposable coin cells when you can simply recharge them? The CT-ENERGY LIR2450 pack is a game-changer for anyone tired of constant battery replacements in car key fobs, remote controls, or small Bluetooth speakers. These 3.7V lithium-ion cells offer a massive advantage with a low self-discharge rate of less than 3% per month, meaning they stay ready when you need them. While you should keep in mind they won't provide the same single-use runtime as a standard 3V Cr2450, the ability to cycle them over 500 times makes them much more sustainable. Safety is also a priority here, as they include built-in protections against overheating and short circuits. Plus, if you use their compatible charger, you can top up all four cells in just about 3.5 hours.
A Guide to Selecting the Best ct-energy button batteries
Understanding Battery Chemistry and Voltage
The most critical factor in selecting a button battery is matching the chemistry to the device's requirements. Button cells are not interchangeable, even if they look identical in size. The most common types include Lithium, Alkaline, and Silver Oxide. Lithium button batteries are prized for their high energy density and long shelf life, making them ideal for devices that need to perform in extreme temperatures or require a consistent, high-output power stream over several years. Alkaline cells are generally more budget-friendly and suitable for low-drain devices like small toys or simple LED lights. Silver Oxide batteries are the gold standard for precision electronics like watches and medical sensors because they provide a very stable voltage throughout their entire discharge cycle, preventing the gradual 'dimming' or slowing down often seen in other chemistries.
Dimensional Accuracy and Fit
In the world of button batteries, a fraction of a millimeter can be the difference between a perfect connection and a device that refuses to turn on. Button batteries are categorized by alphanumeric codes that represent their diameter and height. It is vital to verify these measurements against your device's manual. A battery that is slightly too thick may prevent the compartment from closing or damage the spring contacts, while a battery that is too thin may result in a loose connection, causing intermittent power loss. Always prioritize brands that emphasize tight manufacturing tolerances to ensure that the physical dimensions are consistent across every single cell in the pack.
Capacity and Discharge Rates
Not all button batteries are created equal when it comes to how much energy they can hold. If you are powering a device that requires periodic high-energy bursts—such as a Bluetooth tracker or a digital thermometer—you need a battery with a high discharge rate. Conversely, for devices that draw a very tiny amount of power over a long period, such as a kitchen scale, capacity (measured in milliamp-hours) is the most important metric. Look for cells that offer a high capacity-to-size ratio to minimize how often you have to replace them. High-quality cells will also maintain their voltage more effectively as they deplete, ensuring your device operates at peak performance until the very end of the battery's life.
Safety and Leakage Protection
Because button batteries are small and often used in devices that are handled frequently, safety is paramount. One of the greatest risks with low-quality button cells is leakage. When a battery fails or is depleted, it can leak alkaline electrolytes that corrode the metal contacts and destroy the internal circuitry of your expensive electronics. When shopping, look for batteries that feature robust sealing and are rated for high resistance to leakage. Additionally, because these batteries pose a significant ingestion risk to children and pets, always opt for reputable brands that package their products in child-resistant, clearly labeled containers to prevent accidental misuse.
Shelf Life and Storage Stability
Since many devices using button batteries are used infrequently, the shelf life of the battery is a decisive factor. You want a battery that can sit in a drawer for two or three years and still deliver 100% of its rated capacity when needed. Lithium chemistries typically offer the best shelf life, often lasting up to a decade if stored correctly. Avoid buying bulk packs of generic batteries if you do not intend to use them immediately, as cheaper, unbranded cells often suffer from higher self-discharge rates, meaning they lose power simply by sitting on the shelf.
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Quick answers about Ct-Energy Button Batteries before you buy.
In the context of button cells, 'CT' often refers to specific technical standards or capacity ratings used to ensure the battery meets the discharge requirements for small electronic devices like hearing aids or remote controls.
You can test a button battery using a multimeter to check the voltage. If the reading is significantly lower than the rated voltage (e.g., below 2.8V for a 3V cell), the battery is nearing the end of its life.
Most standard button batteries, including common lithium and alkaline types, are primary cells and are not rechargeable. Attempting to recharge them can cause leakage or explosion.
Lifespan depends on the device's power draw, but high-quality lithium button cells can last anywhere from 1 to 5 years in low-drain devices like car key fobs or watches.
Store them in a cool, dry place inside their original packaging. Keep them far out of reach of children and pets, as swallowing a button battery is a critical medical emergency.
Leakage usually occurs due to chemical degradation or if the battery is left in a device that is not being used. Always remove batteries from electronics if they will be stored for extended periods.
It is not recommended. Mixing brands or mixing old and new batteries can lead to uneven power discharge, reduced lifespan, and potential leakage.
Lithium button cells generally offer a higher energy density, longer shelf life, and more consistent voltage output compared to alkaline versions, making them better for high-performance electronics.
Rankings & Insights
Our Ct-Energy Button Batteries Rankings
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