Power & Relay
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12V Industrial Power Supply Unit (1A to 40A) | Reliable DC Transformer
Regular price From HK$19.00Regular priceSale price From HK$19.00 -
12.6V 5A Smart Li-ion Battery Charger for 3-Series 18650 Packs
Regular price HK$129.00Regular priceSale price HK$129.00 -
1.2V 600mAh Ni-MH AAA Rechargeable Batteries | Long-Lasting Power
Regular price HK$35.00Regular priceSale price HK$35.00 -
AA NiMH Rechargeable Battery 1.2V 1200mAh - DIY & Safety Ready
Regular price HK$12.00Regular priceSale price HK$12.00 -
3.7V 14500 Li-ion Rechargeable Battery (1300mAh) – AA Size Cell
Regular price HK$15.00Regular priceSale price HK$15.00 -
4S 20A 18650 Lithium Battery Protection Board | 14.8V 16.8V BMS Module
Regular price HK$25.00Regular priceSale price HK$25.00 -
4S 16.8V 18650 Lithium Battery Capacity Indicator Board
Regular price HK$20.00Regular priceSale price HK$20.00 -
1S 3.7V 10A 18650 Battery Protection Board (BMS) | Safe Lithium Power
Regular price HK$10.00Regular priceSale price HK$10.00 -
CR2032 Battery Holder Case with Switch & Leads | 3V/6V DIY Power
Regular price HK$5.00Regular priceSale price HK$5.00 -
2S 7.4V 15A Lithium Battery Protection Board (BMS) | 18650 Safe Guard
Regular price HK$15.00Regular priceSale price HK$15.00 -
3A Type-C Lithium Battery Fast Charging Board - IP2312 High Efficiency
Regular price HK$15.00Regular priceSale price HK$15.00 -
5.5mm x 2.1mm DC Female to 2Pin Lithium Battery Charging Cable
Regular price HK$15.00Regular priceSale price HK$15.00 -
2-Pack 21700 Battery 5000mAh 3.7V | High Capacity Rechargeable Cell
Regular price HK$68.00Regular priceSale price HK$68.00 -
3.7V 10000mAh LiPo Battery Rechargeable Polymer Cell (170x60x10mm)
Regular price HK$58.00Regular priceSale price HK$58.00 -
21700 Battery Holder - Single, Dual, and Triple Slot Options
Regular price From HK$10.00Regular priceSale price From HK$10.00 -
LX-LBC3 Type-C 2-in-1 Charging & Discharging Module (5V 1.2A)
Regular price HK$10.00Regular priceSale price HK$10.00
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.