Side-by-Side Comparison
Cylindrical Cells
18650 vs. AA Battery
Comparing 2 standards across 4 specifications. 4 key differences identified.
Comparing:
18650
AA Battery
An 18650 Li-ion cell measures 18.6mm in diameter and 65.2mm in length. It operates at 3.6V/3.7V nominal, charges up to 4.2V max, and has a discharge cutoff of 2.5V with capacities between 2200 and 3500 mAh.
A standard AA battery measures 14.5mm in diameter and 50.5mm in length. Primary Alkaline cells output 1.5V, NiMH rechargeable cells output 1.2V. Inserting a 3.6V 14500 Li-ion cell into 1.5V AA devices destroys the circuit.
Specification Comparison Table
4 Parameters| Parameter / Spec | ||
|---|---|---|
|
Diameter
|
18.60 mm | 14.50 mm |
|
Overall Length
|
65.20 mm | 50.50 mm |
|
Nominal Operating Voltage
|
3.60 / 3.70 V | — |
|
Alkaline Voltage
|
— | 1.50 V |