AAA batteries are smaller, with a diameter of 10.5mm and length of 44.5mm, about 30% smaller than AA batteries. Like AA batteries, they come in alkaline (1.5V) and NiMH (1.2V) options.
Their capacity is lower due to their smaller size: alkaline AAA batteries typically range from 500-1000mAh, while rechargeable NiMH AAA batteries offer 600-1200mAh. This makes them better suited for low-power, compact devices where space is limited, such as TV remotes, wireless computer mice, small flashlights, and portable gaming controllers.
The primary differences lie in size, capacity, and suitability for specific devices—traits that directly impact how they perform in real-world use.
Dimensions physiques et compatibilité
Size is the most obvious distinction. AA batteries’ larger dimensions (14.5mm x 50.5mm) require more space in device compartments, while AAA batteries (10.5mm x 44.5mm) fit into slimmer, more compact designs.
Device manufacturers design battery compartments to match specific sizes, so an AAA battery cannot reliably replace an AA battery (it will be too small, leading to loose connections), and vice versa (an AA battery will not fit into an AAA compartment). Always check the device manual for size requirements.
Capacité et production d'énergie
AA batteries’ larger volume allows them to store more energy. For example, a high-capacity alkaline AA battery (2700mAh) can power a toy car for 4-6 hours, while an AAA battery (1000mAh) in the same device would last 1-2 hours.
Discharge rates (how quickly energy is released) are similar for both when chemistry is the same (e.g., alkaline or NiMH), but AA batteries’ higher capacity means they sustain power longer in devices with steady energy demands (like a portable fan), whereas AAA batteries excel in devices with brief, low power uses (like a remote control button press).
Comparison Table: AA vs AAA Battery
Fonctionnalité
Pile AA
AAA Battery
Diamètre
14.5mm
10.5mm
Longueur
50.5mm
44.5mm
Tension nominale
1.5V (alkaline); 1.2V (NiMH)
1.5V (alkaline); 1.2V (NiMH)
Plage de capacité
1000-3000mAh
500-1200mAh
Taux de décharge typique
Moderate to high
Low to moderate
Applications courantes
Toys, cameras, shavers
Remotes, mice, small flashlights
Avantages et inconvénients de chaque type de batterie
Pros and Cons of AA Batteries
– Pros: Higher capacity for longer runtime; versatile for medium-power devices; widely available; rechargeable versions offer cost savings over time.
– Cons: Larger size limits are used in compact devices; alkaline variants generate more waste when disposed of; heavier than AAA batteries.
Pros and Cons of AAA Batteries
– Pros: Compact size fits small devices; lightweight; sufficient for low-power needs; affordable and easy to find.
– Cons: Lower capacity leads to shorter runtime; not suitable for high-power devices; rechargeable versions may have shorter lifespans than AA NiMH.
Conclusion
AA and AAA batteries are foundational to everyday electronics, but their differences in size and capacity make them far from interchangeable. AA batteries excel in medium-power, space-available devices, offering longer runtime, while AAA batteries are the go-to for small, low-power gadgets. When choosing, consider your device’s size, power demands, and whether rechargeable (for frequent use) or disposable (for occasional use) options make more sense.
Why Choose Pkcell as Your AAA and AA Batteries Supplier?
PKCELL is a leading B2B battery supplier with over 20 years of experience, offering high-quality AAA and AA batteries for a wide range of industrial and commercial applications. Our AA and AAA batteries, available in both alkaline and rechargeable NiMH versions, deliver reliable, long-lasting performance for everyday and professional devices. With advanced manufacturing, strict quality control, and certifications like ISO9001, CE, and RoHS, PKCELL ensures consistent product quality and dependable supply.
Can I use AA batteries in a device designed for AAA?
No. AA batteries are larger than AAA batteries and will not fit into AAA compartments, potentially damaging the device or causing safety risks. Always use the size specified by the manufacturer.
Are rechargeable AA and AAA batteries worth it?
Yes, if the device is used frequently. Rechargeable NiMH AA/AAA batteries can be reused 500-1000 times, reducing long-term costs compared to disposable alkaline batteries. They are ideal for high-use devices like toys or cameras.
Do AA and AAA batteries have the same lifespan?
Alkaline AA batteries generally last longer in storage (5-10 years) than alkaline AAA batteries (3-7 years) due to their larger capacity. Rechargeable NiMH batteries have similar shelf lives (3-5 years when stored properly) but self-discharge more
Vous pouvez nous joindre par téléphone, par courrier électronique ou en remplissant le formulaire de contact ci-dessous. Nous nous efforçons de répondre à toutes les demandes dans les 24 heures.