Power & Relay
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12V 1A DC Power Adapter - 5.5x2.1mm Output, UK Plug
Regular price HK$30.00Regular priceSale price HK$30.00 -
18AWG DC Power Extension Cable - 5.5x2.1mm Male/Female Cord
Regular price From HK$12.00Regular priceSale price From HK$12.00 -
12V 2A 24W AC Power Adapter | UK 3-Pin Plug | 5.5mm x 2.1mm DC Tip
Regular price HK$48.00Regular priceSale price HK$48.00 -
Maxell CR2032 3V Lithium Battery - Single Pack
Regular price HK$3.00Regular priceSale price HK$3.00 -
AA Battery Holder with Switch & Leads – 2/3/4/8 Slot Options
Regular price From HK$5.00Regular priceSale price From HK$5.00 -
TP4056 Type-C USB 5V 1A Lithium Battery Charger Module
Regular price HK$10.00Regular priceSale price HK$10.00 -
3.7V Lithium Battery Charger Board | DC-DC Step-Up Boost Module
Regular price HK$18.00Regular priceSale price HK$18.00 -
CR927 Lithium 3V Coin Cell Battery (1pc) - Long-Lasting Power
Regular price HK$3.00Regular priceSale price HK$3.00 -
Panasonic NCR18650GA 3300mAh Li-ion Rechargeable Battery (Authentic)
Regular price HK$48.00Regular priceSale price HK$48.00 -
18650 Lithium Battery Pack - Rechargeable 3.7V / 7.4V / 12V Li-ion
Regular price From HK$29.00Regular priceSale price From HK$29.00 -
18650 Battery Holder with Hard Pins - 1, 2, 3, or 4 Slot Options
Regular price From HK$8.00Regular priceSale price From HK$8.00 -
5V 2.5A Universal AC/DC Power Adapter - 5.5x2.1mm DC Plug, UK
Regular price HK$40.00Regular priceSale price HK$40.00 -
USB to DC Charger Cable for 18650 Lithium Battery (4.2V/8.4V/12.6V)
Regular price HK$25.00Regular priceSale price HK$25.00 -
Microbit AAAx2 3V Battery Holder with Switch – JST Connector
Regular price HK$6.00Regular priceSale price HK$6.00 -
9V Battery Holder Box with Cover and ON/OFF Switch
Regular price HK$8.00Regular priceSale price HK$8.00 -
4A DC-DC Boost Converter Module with Voltmeter Display
Regular price HK$39.00Regular priceSale price HK$39.00
Collection: Power & Relay
Reliable Power Supply & Relay Modules for Electronic Projects
Explore our comprehensive range of power management and control components designed for STEM education, DIY electronics, and professional engineering applications. From stable voltage regulation to safe battery storage, we provide the essential hardware to keep your circuits running efficiently and securely.
Key Components for Your Circuit
- DC-DC Converters & Voltage Regulators: Efficient step-down (buck) and step-up (boost) modules for precise voltage control in complex setups.
- Relay Modules: Securely control high-voltage appliances using low-power microcontroller signals, perfectly compatible with Arduino and ESP32.
- Battery Solutions: A wide selection of 18650 LiPo batteries, safe BMS protection boards, and durable battery holders for portable power needs.
- Power Adapters: Stable AC to DC power supplies ensuring continuous and reliable device operation.
How to Choose the Right Power Component?
- Voltage Requirements: Ensure your step-down/step-up modules match the exact input and output voltage of your specific motherboard and peripherals.
- Current Rating (Amperage): Select power adapters and relays that can easily handle the maximum current load of your project to prevent overheating.
- Safety Features: When working with portable power, always opt for battery chargers and BMS modules with built-in overcharge and short-circuit protection.