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

26650 vs. AAAA

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

Comparing:
26650
AAAA
26650 →

A 26650 Li-ion cell measures 26mm in diameter and 65mm in length, used in high-drain devices like flashlights, power tools, and RC-hobby battery packs. The format is produced in multiple chemistries with different nominal voltages, so '26650' alone does not guarantee a specific voltage.

View full 26650 spec sheet →
AAAA →

A AAAA battery (IEC designation LR8D425) is a 1.5V Alkaline cell measuring approximately 8.3mm in diameter and 42.5mm in length -- smaller than a AAA. It's used in devices with especially tight internal space, such as laser pointers, some styluses, and compact LED penlights.

View full AAAA spec sheet →

Specification Comparison Table

5 Parameters
Parameter / Spec
26650
AAAA
Diameter
26.00 mm 8.30 mm
Overall Length
65.00 mm 42.50 mm
Chemistry
Lithium-ion (Li-ion or LiFePO4, varies by product) Alkaline
Nominal Operating Voltage
— 1.50 V
Nominal Capacity (at 10mA)
— ~625 mAh

Other Alternatives to Compare

Compare 26650 vs. 14500 → Compare 26650 vs. 18650 → Compare 26650 vs. 21700 → Compare 26650 vs. 9V Battery → Compare 26650 vs. AA Battery → Compare 26650 vs. AAA Battery → Compare 26650 vs. C Battery → Compare 26650 vs. D Battery → Compare 26650 vs. N / LR1 →