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9V Alkaline Battery (6LR61)

Power

9V alkaline battery with a snap connector. It can power an Arduino through VIN or the power jack; the board's regulator burns the extra voltage off as heat, so it runs down quickly in long use. Handy for short tests with sensors and LEDs.

Specifications

Nominal voltage

9V

Chemistry

Alkaline (6LR61 / 6F22)

Typical capacity

500 - 600 mAh

Recommended continuous current

≤ 50 mA

Connection

Snap connector

Size

48.5 x 26.5 x 17.5 mm

Weight

~45 g

Shop prices

• SAMM MarketIn stock44.65 ₺
• HobiDevreIn stock74.88 ₺
• KomponentciIn stock77.66 ₺
• RobotsepetiIn stock182.87 ₺
• ElektrovadiIn stock240.48 ₺
• RobotistanOut of stock55.91 ₺
• Direnc.netOut of stock76.72 ₺
• RobocomboOut of stock84.00 ₺
• Robo90Out of stock113.09 ₺
• MotorobitOut of stock126.25 ₺
• Robolink MarketOut of stock138.00 ₺

Prices read from the shops' pages on 22 October 2026. Prices and stock may have changed since; check at the shop before you buy.

Projects with this part

• Arduino-Free Dark-Activated LampBeginner25 minA night light with no Arduino and no code, built from just a 9V battery, a BC547 transistor, an LDR and a potentiometer: when it gets dark the LED lights by itself, and it goes out when the light comes back. With the potentiometer you set how dark it must be. It teaches three cornerstones of basic electronics: the voltage divider (the potentiometer and the LDR), the transistor as a switch that turns a large current on and off with a small base current, and limiting an LED's current with a resistor. You see how these parts, used in Arduino projects all the time, work without one.Open project