# item.guide
Side-by-Side Comparison Cylindrical Cells

14500 vs. AAA Battery

Comparing 2 standards across 5 specifications. 5 key differences identified.

Comparing:
14500
AAA Battery

A 14500 Li-ion cell measures 14mm in diameter and 50mm in length -- the same physical size as a standard AA battery -- but delivers 3.7V nominal rather than an AA's 1.5V. Because it fits mechanically into AA-sized battery holders, mixing it up with a real AA can destroy 1.5V-only circuitry.

View full 14500 spec sheet →

A AAA battery (IEC designation LR03, ANSI 24A) measures 10.5mm in diameter and 44.5mm in length. Alkaline AAA cells output 1.5V nominal; NiMH rechargeable AAA cells output 1.2V. Typical alkaline capacity runs roughly 800 to 1,200 mAh depending on discharge rate.

View full AAA Battery spec sheet →

Specification Comparison Table

5 Parameters
Parameter / Spec
Diameter
14.00 mm 10.50 mm
Overall Length
50.00 mm 44.50 mm
Nominal Operating Voltage
3.70 V
Chemistry
Lithium-ion
Alkaline Voltage
1.50 V