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

26650 vs. 9V Battery

Comparing 2 standards across 7 specifications. 7 key differences identified.

Comparing:
26650
9V Battery

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 →

A 9V battery (IEC designation 6LR61, commonly called PP3) is a rectangular battery measuring approximately 48.5mm x 26.5mm x 17.5mm with two snap terminals. Alkaline 9V cells output 9.0V nominal from six internal 1.5V cells in series, with typical capacity around 400-600 mAh.

View full 9V Battery spec sheet →

Specification Comparison Table

7 Parameters
Parameter / Spec
Diameter
26.00 mm
Overall Length
65.00 mm
Chemistry
Lithium-ion (Li-ion or LiFePO4, varies by product)
Height
48.50 mm
Width
26.50 mm
Depth
17.50 mm
Nominal Operating Voltage
9.00 V