18650 vs 14500
Battery Comparison
Home > Battery Comparisons > 18650 vs 14500
| Feature | 18650 | 14500 |
|---|---|---|
| Diameter | 18mm | 14mm |
| Length | 65mm | 50mm |
| Nominal voltage | 3.6-3.7V (Li-ion) | 3.6-3.7V (Li-ion) |
| Typical capacity | 2,000-3,500 mAh | 600-1,200 mAh |
| Weight | ~45-48g | ~20g |
| Rechargeable | Yes (hundreds of cycles) | Yes (hundreds of cycles) |
| Common chemistries | Li-ion (NMC, NCA), LiFePO4 | Li-ion (NMC, NCA), LiFePO4 |
| Device compatibility | Flashlights, laptops, power tools, e-bikes, vapes | Small flashlights, some AA-sized devices with lithium support |
| Cost per cell | Higher | Lower |
| Cost per mAh | Often lower (larger capacity per cost) | Often higher per mAh due to smaller size |
| Availability | Extremely widespread, many brands | Common in hobbyist/flashlight stores, narrower selection |
| Interchangeability | Not compatible with 14500 devices; different size | Same voltage as 18650 but not interchangeable due to size; only fits devices/holders sized for 14500 (same form factor as AA, but NOT voltage-compatible with standard AA devices) |
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