Keep your Raspberry Pi Compute Module 4 system powered when external power changes with the Waveshare PoE UPS Base Board. It supports all CM4 variants through its standard socket and provides a color-coded Raspberry Pi 40-pin GPIO header.
Choose USB, 7–36V DC, or PoE for external power. The board charges up to three parallel 18650 Li-ion batteries while powering the system, then switches to battery output when external power is unavailable. Battery monitoring through I2C reports voltage, current, power, and remaining capacity, helping you save files and shut down by software when voltage is low.
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Protection: Includes overcharge, over-discharge, overcurrent, short-circuit, reverse-polarity, and resettable battery fuses.
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Expansion: Adds USB, HDMI, M.2, camera, display, RTC, fan, storage, and networking connections.
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PoE: The Gigabit Ethernet connector integrates an 802.3af-compliant 5V/2.5A PoE circuit.
This base board is designed to provide monitored, backup power and expanded connectivity for Raspberry Pi Compute Module 4 projects.
Specifications
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Brand: Waveshare
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Product type: PoE UPS base board
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CM4 socket: Suitable for all Compute Module 4 variants
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Battery support: Three parallel 18650 Li-ion batteries
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Battery status: Batteries not included
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Power inputs: USB, 7–36V wide-voltage DC, and PoE
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PoE: Gigabit Ethernet RJ45 connector with 802.3af-compliant PoE circuit, 5V/2.5A
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USB: Four USB 2.0 Type-A ports
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GPIO: Raspberry Pi 40-pin GPIO header
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Expansion slot: M.2 M-key slot for NVMe SSD or a communication module with PCIe M.2 M-key interface
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Display: One MIPI DSI port with a 22-pin, 0.5mm FPC connector
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Camera: Two MIPI CSI-2 ports with 22-pin, 0.5mm FPC connectors
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Video: Two HDMI ports supporting 4K at 30 fps output
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RTC: Real-time clock with battery socket and Compute Module 4 wake capability
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Storage: MicroSD card socket for Compute Module 4 Lite variants without eMMC
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Fan: Adjustable speed and measurement; 5V/12V
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Indicators: M.2 status LED and CM4 status LED
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Monitoring: I2C monitoring of battery voltage, current, power, and remaining capacity
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Dimensions: 175.0 × 108.0mm
Packaging
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One package weight: 0.17kg / 0.37lb
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One package size: 15 × 12 × 3cm / 5.91 × 4.72 × 1.18in
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Quantity per carton: 100 units
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Carton weight: 16.00kg / 35.27lb
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Carton size: 52 × 35 × 37cm / 20.47 × 13.78 × 14.57in
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20GP loading: 396 cartons × 100 units = 39,600 units
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40HQ loading: 919 cartons × 100 units = 91,900 units
| Package Weight |
| One Package Weight |
0.17kgs / 0.37lb |
| One Package Size |
15cm * 12cm * 3cm / 5.91inch * 4.72inch * 1.18inch |
| Carton Weight |
16.00kgs / 35.27lb |
| Carton Size |
52cm * 35cm * 37cm / 20.47inch * 13.78inch * 14.57inch |
| Loading Container |
20GP: 396 cartons * 100 pcs = 39600 pcs
40HQ: 919 cartons * 100 pcs = 91900 pcs
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