Which Batteries You Really Need for Your SwitchBot Devices in 2026

Hello, I’m Itsuki (@saigalog), turning my whole home into a smart home with the SwitchBot series.

Speaking of SwitchBot, it is now well-known as a pioneer in IoT gadgets.

Starting with the representative “SwitchBot Bot”, there is a full lineup of products including smart locks and temperature and humidity sensors.

While many can be USB charged or powered, some devices require alkaline or button batteries.

When replacing batteries, many people probably wonder, “Which battery does this SwitchBot device use again…“

So in this article, I have summarized SwitchBot products that need battery replacement and their battery types, also serving as a reminder for myself who tends to forget.

SwitchBot Products That Require Battery Replacement

For those who want me to skip the details and just give the conclusion.

For such readers, I have summarized the SwitchBot products that require battery replacement and their battery types (and quantity) in the table below.

Product Name	Required Battery Type
SwitchBot Bot	CR2 × 1
SwitchBot Remote Button	CR2450 × 1
SwitchBot Temperature & Humidity Sensor	Alkaline AAA × 2
SwitchBot Temperature & Humidity Sensor Plus	Alkaline AAA × 2
SwitchBot Waterproof Temperature & Humidity Sensor	Alkaline AAA × 2
SwitchBot Temperature & Humidity Sensor Pro	Alkaline AA × 2
SwitchBot CO2 Sensor	Alkaline AA × 2
SwitchBot Motion Sensor	Alkaline AAA × 2
SwitchBot Contact Sensor	Alkaline AAA × 2
SwitchBot Lock	CR123A × 2
SwitchBot Lock Pro	Alkaline AA × 4
SwitchBot Keypad	CR123A × 2
SwitchBot Keypad Touch	CR123A × 2

Alkaline batteries are easy to find anywhere, but for other batteries, many are not sold at convenience stores or supermarkets, so I recommend looking for them on EC sites like Amazon.

From here, I will go into the details of each SwitchBot product with actual photos.

SwitchBot Bot

The “SwitchBot Bot” is a smart switch with a moving robotic arm that can press physical buttons to toggle them ON/OFF.

The battery required for the “SwitchBot Bot” is “CR2” × 1.

SwitchBot Remote Button

The “SwitchBot Remote Button” is a smart switch that can operate SwitchBot devices with a single touch via Bluetooth connection.

The battery required for the “SwitchBot Remote Button” is “CR2450” × 1.

SwitchBot Temperature & Humidity Sensor

The “SwitchBot Temperature & Humidity Sensor” measures and records temperature and humidity and can be used as a trigger to control other smart home devices.

The battery required for the “SwitchBot Temperature & Humidity Sensor” is “Alkaline AAA” × 2.

SwitchBot Temperature & Humidity Sensor Plus

The “SwitchBot Temperature & Humidity Sensor Plus” measures and records temperature and humidity and can also be used as a trigger to control other smart home devices.

The battery required for the “SwitchBot Temperature & Humidity Sensor Plus” is “Alkaline AAA” × 2.

SwitchBot Waterproof Temperature & Humidity Sensor

The “SwitchBot Waterproof Temperature & Humidity Sensor” measures and records temperature and humidity and can also be used as a trigger to control other smart home devices.

The required batteries for “SwitchBot Waterproof Thermo-Hygrometer” are “Alkaline AAA batteries” × 2.

SwitchBot Thermo-Hygrometer Pro

“SwitchBot Thermo-Hygrometer Pro” is a thermo-hygrometer with excellent visibility that can also display the weather forecast.

The required batteries for “SwitchBot Thermo-Hygrometer Pro” are “Alkaline AA batteries” × 2.

SwitchBot CO2 Sensor

“SwitchBot CO2 Sensor” is a smart CO2 sensor that can also display temperature, humidity, and weather forecasts.

The required batteries for “SwitchBot CO2 Sensor” are “Alkaline AA batteries” × 2.

SwitchBot Motion Sensor

“SwitchBot Motion Sensor” is a compact and convenient motion sensor that detects movement and can send notifications to your smartphone or trigger other devices.

The required batteries for “SwitchBot Motion Sensor” are “Alkaline AAA batteries” × 2.

SwitchBot Door/Window Sensor

“SwitchBot Door/Window Sensor” is a compact and convenient sensor that detects the opening and closing of doors and windows and can notify your smartphone or trigger other devices.

The required batteries for “SwitchBot Door/Window Sensor” are “Alkaline AAA batteries” × 2.

SwitchBot Lock

“SwitchBot Lock” is a feature-rich smart lock that supports smartphone apps, NFC tags, remote control, and automatic locking.

The required batteries for “SwitchBot Lock” are “CR123A” × 2.

SwitchBot Lock Pro

“SwitchBot Lock Pro” is a feature-rich smart lock that supports smartphone apps, NFC tags, remote control, and automatic locking.

The required batteries for “SwitchBot Lock Pro” are “Alkaline AA batteries” × 4.

SwitchBot Keypad

“SwitchBot Keypad” is an IoT keypad that supports apps, passcodes, and NFC cards, and can be locked/unlocked via voice operation.

The required batteries for “SwitchBot Keypad” are “CR123A” × 2.

SwitchBot Keypad Touch

“SwitchBot Keypad Touch” is an IoT keypad that supports apps, passcodes, and NFC cards, and can be locked/unlocked via voice operation.

The required batteries for “SwitchBot Keypad Touch” are “CR123A” × 2.

Summary of Required Batteries for SwitchBot Series

This article explains “A Thorough Guide to Required Batteries for SwitchBot Series in 2026”.

As the number of products in the SwitchBot series increases each year, this article will be updated accordingly.

If you get a new SwitchBot product and forget which batteries are required, please refer to this article again.