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eufy Security Flood & Freeze Sensor E20, Water Leak Detector &Freeze Alarm Extended Reach with Cable, 75 dB Alarm, 5-Year Battery, Requires HomeBase 2, 3, Mini, or Pro. For Basement, Kitchen, Laundry

$39^.99

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AJMRTC LTC4150 Coulomb Counter Sensor Module, High Side Battery Charge Discharge Current Detection Sensor, Charge Meter Gauge for Lithium Battery Capacity Monitoring DIY Project

$23^.62

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AJMRTC MAX17043 LiPo Fuel Gauge Module, 1S Lithium Battery SOC Voltage Detector Sensor, I2C A/D Converter with Programmable Low Power Alarm for Arduino ESP32 DIY Project

$23^.94

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INA226 Bi-directional Current and Power Monitoring Module I2C IIC Voltage Sensor Board High Precision Electrical Measurement Meter for Battery Monitoring and Power Supply Testing

$11^.89

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AJMRTC 2Pcs INA219 I2C Bi-Directional DC Current Power Supply Sensor Breakout Module, High Precision Voltage Current Power Monitor Sensor Board for Arduino, Raspberry Pi, DIY Battery Power Detection

$20^.23

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AJMRTC 12V 4-Segment Power Indicator Module, Onboard 4-LED Power Level Display Board, 4-Position Voltage LED Indicator Module for Battery Voltage Monitoring, Power Supply Status Detection, Electronic

$11^.26

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AJMRTC MAX17043 LiPo Fuel Gauge Lithium Battery Detection Board Module, A/D Conversion IIC I2C Interface Battery Capacity Monitor Module, for Lithium Battery DIY Electronic Projects

$14^.10

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Soil Moisture Meter,Plant Hygrometer Moisture Sensor Plant Water Monitor for Potted Plants,Garden,Farm, Lawn(No Battery Needed)

$22^.99

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Volume Discounts:$19.99 - $22.99

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Soil Moisture Meter, Soil Moisture Monitor for House Plants, Soil Hygrometer Moisture Sensor for Indoor & Outdoor, Garden, Farm, Lawn Plant Care, No Battery Needed(White)

$18^.99

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Volume Discounts:$15.99 - $18.99

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AJMRTC 10PCS BYD BM3451TNDC-T28A BM3451 SOP-28 IC Chip, 3-5 Cells Lithium Battery Protection Integrated Circuit with Cell Balancing for BMS, Power Tool and UPS Electronic Projects

$10^.58

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AJMRTC INA231 Current & Power Sensor Module, 1Pcs, 1.8V I2C IIC Interface, High Precision Voltage Current Power Monitoring Board for Single Board Computer, Battery Detection & Electronic DIY Projects

$10^.54

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Water Leak Starter Kit: Hub + 4 Leak Sensor 4 (105 dB Siren), LoRa Long-Range, App/SMS/Email Alerts, D2D Offline, 2 AAA Up to 5-Year Battery, Compatible with Alexa/IFTTT/Home Assistant

$115^.99

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Volume Discounts:$112.99 - $115.99

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NGW-1pc Grove Base for XIAO - with embedded battery management chip

$23^.16

More options from $23.16 - $24.26

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TPS63020 Power Supply Module Automatic Buck-Boost Step Up Down 3.3V Lithium Battery Low Ripple

$16^.71

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Volume Discounts:$15.41 - $16.71

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7S 29.4V 15A 18650 Li ion Lithium Battery Protection Board Module BMS PCB Board with Balanced Heat Sink for Li-ion Lithium Battery Cell

$15^.50

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Volume Discounts:$14.20 - $15.50

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NGW-1pc Grove Base for XIAO - with embedded battery management chip

$19^.99

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3S 12.6V 100A Li ion Lithium Battery PCB Protection Board 3 Cells 11.1V Polymer Balance Function Charge Module BMS Circuit Protection PCB Board

$18^.76

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Volume Discounts:$17.46 - $18.76

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3pcs XL4015 5A DC-DC Step Down Charger Modules, CC CV Lithium Battery Charging Board, LED Power Converter

$16^.71

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Volume Discounts:$15.41 - $16.71

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ZK-4KX DC-DC Buck Boost Converter Regulator CNC Adjustable CC CV 0.5-30V Voltage Converter DIY Solar Battery Charging Power Supply Module LCD Display with Shell

$18^.23

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Volume Discounts:$16.93 - $18.23

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NGW-1pc Wio Terminal Chassis - Battery (650mAh)

$49^.99

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AJMRTC INA219 I2C IIC Bi-Directional DC Current Voltage Power Sensor Module, High Precision Current Power Monitoring Breakout Board, 0-26V for Arduino, ESP32, Raspberry Pi, Battery Power Measurement

$15^.96

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Outdoor Temperature & Humidity Sensor, YS8005 | Temp/Humidity App Alerts, Up to 2-Year Battery, Works with Alexa/IFTTT, LoRa Protocol Up to 2034 Feet, Hub Required

$64^.99

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Upgraded Smart Water Leak Detector 1s with High Alarm, 5 Pack | 1804ft Ultra-Long Range, WiFi Water Sensor with SMS/Email/APP Push, 5Yr Battery Life,IP67, Suit for Home, Basement, Kitchen

$103^.99

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Volume Discounts:$100.99 - $103.99

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2PCS 2 Channel Automatic Power Switching Module Automatic Emergency Power Supply Module Switch Dual Power Supply Module AC 90-240V 10A Backup Battery Switch Controller Module

$15^.33

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Volume Discounts:$14.03 - $15.33

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5Pcs KA2284 Level Indicator Module 5 LED Battery Indicator Power Audio Level Indicator Module Board KA2284 3.5V-12V Power Indicator Board

$16^.73

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Volume Discounts:$15.43 - $16.73

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5Pcs HC-SR04 Ultrasonic Sensor Module Kit Distance Sensor Compatible with Mega R3 Duemilanove Nano for Robot XBee ZigBee by ElecRight

$13^.97

More options from $13.97 - $16.51

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HLK-LD1020 10.525GHz Microwave Radar Sensor Module, Low Power Human Micro Motion Detection Intelligent Sensing Module with Pin Header, 5Pcs Pack

$31^.22

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Sensor Bar for Wii, Wireless Sensor Bar for Nintendo Wii and Wii U Console

$26^.99

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Sensor Bar for Wii, Wireless Sensor Bar for Nintendo Wii and Wii U Console

$26^.99

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Motion Sensor Bar for Wii - Wired USB Sensor Bar Replacement for Nintendo Wii and Wii U Console - Game Accessories for Wii, Wii U

$26^.99

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2 Pack Motion Sensor Bar for Wii Remote - Wired USB Sensor Bar Replacement for Nintendo Wii and Wii U Console - Game Accessories for Wii, Wii U

$26^.99

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Digital Infrared Thermometer gun for cooking,BBQ,Pizza oven,Ir Thermometer with Backlight,-58~932(-50~500) Handheld Non Contact Heat Laser Temperature Gun (Not for Human)

$25^.99

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Replacement Wired Infrared IR Ray Motion Sensor Bar Compatible Nintendo Wii and Wii U Console (Silver/Black)

$22^.99

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1pc Grove Temperature and Barometer Sensor, SPA06-003, I2C/SPI Interface, 40x20x6.5mm, 3.3V, ±0.3 hPa Accuracy

$39^.28

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Laser Infrared Thermometer Non-Contact Digital Temperature Gun, -581112(-50600) IR Thermometer for Industrial, Kitchen Cooking, Automotive, HVAC (Not for Human Body Temp)

$26^.99

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4 in 1 Wii Replacement Cables Set, Wii AC Power Adapter + Wii to hdmi Converter+ Wired Motion Sensor Bar and Composite Audio Video Cable for Nintendo Wii

$43^.99

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