SwitchBot Lock Ultra Max

SwitchBot Lock Ultra Max

A 1.1-second retrofit lock with triple power backup and optional Matter, though the keypad that unlocks its best features is sold separately.

Launch Year: 2026
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Our review

SwitchBot Lock Ultra Max Review: A Faster Retrofit Lock That Keeps Your Cylinder

The verdict

The SwitchBot Lock Ultra Max is a premium retrofit lock for European doors: it mounts on the inside of the door over the existing cylinder, unlocks in as little as 1.1 seconds and keeps working through a triple power system. Its weakness is what it leaves out of the box, since passcodes, fingerprints, face recognition and NFC all depend on a keypad sold separately, and remote access needs a SwitchBot hub.

Best for
  • Renters who keep the existing cylinder
  • European profile and oval locks
  • Quiet bedrooms and shared flats
  • SwitchBot ecosystem homes

Pros

  • Unlocks in as little as 1.1 seconds with the 160 rpm brushless motor
  • Quiet Mode rated as low as 53.4 dBA
  • Keeps the existing cylinder and the original key
  • 4,200 mAh main battery plus CR123A backup and supercapacitor
  • Door status, low battery and weather alerts in the app
  • Matter over Bridge and the main ecosystems with a SwitchBot hub

Cons

  • No keypad in the box, so passcodes, fingerprint, face and NFC need the Keypad Vision Pro
  • Bluetooth only, so remote access and Matter need a SwitchBot hub
  • No Apple Home Key
  • Fits European cylinders, not US deadbolts
  • No camera or doorbell

Who is the SwitchBot Lock Ultra Max for?

It suits households with a European profile, oval, Swiss round, knob or night-latch cylinder who want smart entry without changing the lock body or drilling the door. Because the lock replaces the indoor thumbturn and leaves the cylinder in place, the original key still works, which makes it a practical choice for renters and for doors whose outside finish should stay untouched. It is not aimed at US deadbolts or at anyone who wants a keypad and biometric entry in the same box.

What the SwitchBot Lock Ultra Max offers

The UltraDrive brushless motor reaches 160 rpm and can unlock in about 1.1 seconds in Max Mode, with more than 9 kg of turning force for stiff mechanisms, and a Quiet Mode rated as low as 53.4 dBA. Power comes from a 4,200 mAh rechargeable main battery rated for up to nine months, a CR123A backup good for roughly 500 operations and a supercapacitor that gathers residual energy for emergency unlocking. The lock reports door and lock status, low battery, backup battery use and a long list of weather warnings, and it adds AES-128 encrypted Bluetooth control plus Matter over Bridge when a SwitchBot hub is added.

What to know before you buy

The lock itself is Bluetooth only: remote control from the app, Alexa, Google Home, Apple Home, SmartThings and Matter all depend on a SwitchBot Hub, which is included in the combo but not with the standalone lock. Passcodes, fingerprint reading, 3D face recognition and NFC cards require the SwitchBot Keypad Vision Pro, also sold separately, so the standalone unit is limited to the app, Bluetooth proximity and the physical key. There is no camera or doorbell, no Apple Home Key, and installations outside common European cylinders may need an adapter.

Is the SwitchBot Lock Ultra Max worth it?

It is a premium retrofit lock whose value is speed, quiet operation and a power design that avoids lockouts. Buy it on its own if the door already has a European cylinder and app or Bluetooth entry is enough; budget for the Keypad Vision Pro if you want code and biometric entry, and for a SwitchBot hub if you want remote access or Matter. Compared with the previous Lock Ultra it adds a faster motor, a white finish and a slightly higher weight, while keeping the same retrofit approach.

Frequently asked questions

Does the SwitchBot Lock Ultra Max need a hub?

For Bluetooth entry from a phone it does not. Remote access from outside the home, Alexa, Google Home, Apple Home, SmartThings and Matter all need a SwitchBot hub, such as the Hub Mini Matter Enabled.

Does the Lock Ultra Max include a keypad?

No. The standalone lock has no keypad, so passcodes, fingerprint reading, 3D face recognition and NFC cards require the SwitchBot Keypad Vision Pro, sold separately.

Does it work with Apple Home and Matter?

Yes, through Matter over Bridge with a SwitchBot hub. The lock itself connects over Bluetooth 4.2 or later.

How long does the battery last?

The 4,200 mAh rechargeable main battery is rated for up to nine months of typical use. A CR123A backup adds about 500 locking or unlocking operations, and a supercapacitor supports emergency unlocking when both run low.

Will it fit my door?

It is designed for common European cylinders, including EU profile, UK oval, Swiss round, knob cylinders and night latches. Less common installations may need an adapter, and it does not replace a US deadbolt.

Does it have a camera or doorbell?

No. The Lock Ultra Max is a lock only, with no camera, video or doorbell.

Company
SwitchBot logo

SwitchBot

4.2/ 5 avg ratingHong Kong flagHeadquartered in Hong Kong

SwitchBot makes a versatile range of smart home gadgets, most famously the SwitchBot Bot that physically presses existing buttons and switches. Its catalog includes curtain robots, smart locks, sensors, plugs and the SwitchBot Hub, which adds IR control and Matter compatibility. SwitchBot is popular for making non-smart devices smart without rewiring.

Full specifications

Every spec, organized

Browse the full breakdown by category. Tap the on any row for what it means, or the for sources and documentation.

Weather Resistance

NO

Outer Panel Dimensions

-

Inner Panel Dimensions

4.8 × 2.5 × 2.6 in 122 × 62.6 × 66.8 mm

Weight

13.8 oz 391 g

Available in colors

NO

Battery Type

Rechargeable lithium-ion

Battery Life

9 months

Backup Battery

CR123A

2.4 GHz WiFi

NO

5 GHz WiFi

NO

Bluetooth

YES

Z-Wave

NO

Zigbee

NO

Thread Protocol

NO

Other

NO

Google Home

SwitchBot Hub required

Alexa

SwitchBot Hub required

Apple HomeKit

SwitchBot Hub required

Matter over Bridge through the SwitchBot Hub Mini Matter Enabled, sold separately

Samsung SmartThings

SwitchBot Hub required

Home Assistant

SwitchBot Hub required

Matter over Bridge through the SwitchBot Hub Mini Matter Enabled, sold separately

Matter

SwitchBot Hub required

Remote

SwitchBot Hub required

Remote access from the app needs a SwitchBot Hub, sold separately

Bluetooth

YES

Passcode

Keypad required

Passcodes need the SwitchBot Keypad or Keypad Vision Pro, sold separately

Fingerprint

Keypad required

Fingerprint unlocking needs the SwitchBot Keypad Vision Pro, sold separately

Face Recognition

Keypad required

3D face recognition needs the SwitchBot Keypad Vision Pro, sold separately

NFC Tag

Keypad required

NFC card access needs the SwitchBot Keypad Vision Pro, sold separately

Apple Home Key

NO

Physical Key

YES

Retrofits over the existing cylinder, so the original key keeps working

When Away

YES

Afer Door is closed

YES

By Geolocation

YES

Door Locks/Unlocks

YES

Tamper-proof Alert

?

Low Battery Alert

YES

Multiple Unlocking Failure Alert

?

HD Video

NO

2K Video

NO

Night Vision

NO

Internal Storage

NO

MicroSD Card Slot

NO

Motion Detection

NO

Range Of Detection

-

Customizable Area

NO

Door Open/Close

YES

One-Time Password

Keypad required

Guest codes need the SwitchBot Keypad or Keypad Vision Pro, sold separately

Periodic Password

Keypad required

Scheduled codes need the SwitchBot Keypad or Keypad Vision Pro, sold separately

Anti-peep Password

Keypad required

Added digits are entered on the SwitchBot Keypad, sold separately

Emergency Fingerprint

NO

Doorbell

NO

Local Control

YES

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