Complete Guide to Cylindrical Battery Sizes: From 10440 to 4680, From AA to 9V — Every Dimension You Need
In the world of lithium batteries, cylindrical cells have become the “power heart” of everything from consumer electronics to electric vehicles, home energy storage to industrial equipment, thanks to their standardized dimensions, robust packaging, and stable performance. Different sizes serve completely different applications — choosing the right size is often more important than choosing the right brand.
Have you ever been confused by numbers like 10440, 14500, 18650, 21700, 26650, 32700 and designations like AA, AAA, 9V, D? In fact, most numeric model numbers directly reveal the battery’s physical dimensions: the first two digits represent diameter (mm), and the last two or three digits represent height (mm). For example, 18650 means 18mm in diameter and 65mm in height; 21700 means 21mm in diameter and 70mm in height. Meanwhile, AA, AAA, 9V, D are traditional consumer battery codes.
Today, we will walk you through the most common cylindrical battery sizes on the market — from tiny to massive, from lithium-ion to traditional formats — to help you quickly find the perfect cell for your device.
🔋 Micro & Small Series (Diameter ≤ 16mm)
These batteries are mainly used in portable, compact electronic devices.
| Model | Diameter×Height | Typical Capacity | Common Applications |
|---|---|---|---|
| 10440 | 10×44mm | 300-600mAh | Mini flashlights, Bluetooth headsets, small remotes |
| 14250 | 14×25mm | 200-400mAh | Small industrial sensors, medical devices, memory backup |
| 14500 | 14×50mm | 800-1600mAh | AA replacement, high-power flashlights, electric toothbrushes, digital cameras |
| 16340 | 16×34mm | 600-900mAh | CR123A replacement, tactical flashlights, laser rangefinders |
| 16500 | 16×50mm | 1000-1600mAh | Headlamps, older laptop battery packs |
| 16650 | 16×65mm | 1600-2200mAh | Specific industrial equipment, high-end flashlights |
💡 Note: The 14500 is the same size as a standard AA battery but has a voltage of 3.7V. Do not directly replace disposable batteries without confirming device compatibility.
🔋 Mid-Size Mainstream Series (Diameter 18mm)
This is the most popular and versatile segment of cylindrical batteries.
| Model | Diameter×Height | Typical Capacity | Common Applications |
|---|---|---|---|
| 18500 | 18×50mm | 1200-1600mAh | Medical equipment, industrial instruments, some flashlights |
| 18650 | 18×65mm | 1500-3500mAh | Global standard: laptops, high-power flashlights, power tools, power banks, energy storage, vapes |
| 21700 | 21×70mm | 4000-5000mAh | Next-gen standard: EVs (Tesla), high-power flashlights, e-scooters, large-scale storage |
🔥 18650 vs 21700: The 21700 offers about 47% more volume and 30%-40% higher capacity per cell, with better energy density. It is rapidly replacing the 18650 as the go-to choice for high-end devices.
🔋 Large & Power Series (Diameter ≥ 22mm)
These batteries are typically used for high-power output or large-capacity energy storage.
| Model | Diameter×Height | Typical Capacity | Common Applications |
|---|---|---|---|
| 22650 | 22×65mm | 2500-3000mAh | Power tools, early EVs |
| 26650 | 26×65mm | 4000-5500mAh | High-power flashlights, e-bikes, energy storage systems |
| 32650 | 32×65mm | 5000-6500mAh | Solar streetlights, backup power, RV batteries |
| 32700 | 32×70mm | 5500-6500mAh | Large-scale storage, low-speed EVs |
| 32140 | 32×140mm | 8000-15000mAh | EV battery packs, large storage cabinets |
| 4680 | 46×80mm | 20000-30000mAh | Tesla‘s next-gen cell, vehicle platforms, super storage |
| 46180 | 46×180mm | 30000-35000mAh | Large storage systems, special vehicles, industrial backup |
🔋 4680 & 46180: Tabless technology significantly reduces internal resistance, enabling ultra-fast charging. These are the future of high-capacity storage and EV propulsion.
🔋 Traditional Consumer Battery Sizes (AA / AAA / 9V / D)
These are the most common cylindrical batteries in daily life. They typically have voltages of 1.5V or 1.2V (NiMH/alkaline), but rechargeable lithium-ion versions at 3.7V are also available. The 9V battery, though rectangular in shape, usually contains six or seven miniature cylindrical cells (such as AAAA) inside, so it is often discussed alongside cylindrical batteries.
| Model | Approx. Diameter×Height | Nominal Voltage | Common Applications |
|---|---|---|---|
| AAAA | 8×42mm | 1.5V | Inside 9V batteries, stylus pens, laser pointers |
| AAA | 10×44mm | 1.5V / 1.2V / 3.7V | Remote controls, wireless mice, electronic toys |
| AA | 14×50mm | 1.5V / 1.2V / 3.7V | Clocks, cameras, electric toothbrushes, game controllers |
| 9V | 26×48×17mm (rectangular) | 9V (6F22 or 6LR61) | Multimeters, smoke detectors, guitar effects pedals |
| D | 34×61mm | 1.5V / 1.2V | Large flashlights, radios, emergency lights, boomboxes |
⚠️ Note: The 9V battery is not cylindrical, but its internal cells often are. If you need rechargeable 9V lithium-ion batteries (typically 2S or 3S lithium), we offer those as well.
🛒 We Offer the Full Size Range — One-Stop Sourcing
No matter which size you need — from tiny 10440 to massive 4680, from traditional AA/AAA/D to rechargeable 9V versions, from power-oriented 21700/26650 to high-capacity 18650 — we have you covered. All cells are genuine factory A-grade, with brand options including Samsung, LG, Murata (Sony), Panasonic, Molicel, EVE, BAK, Lishen, and more.
Our advantages:
✅ Full size range in stock, samples available
✅ Authorized sourcing, 100% genuine
✅ UN38.3, MSDS, and full shipping certifications
✅ B2B bulk discounts, global logistics
👉 Visit our Full Cylindrical Battery Product Page now, or go directly to the 18650 Section / 21700 Section to order.
If you have any questions about size selection, feel free to contact us. Our engineering team provides free technical support!