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Description
Waveshare PoE UPS Base Board for Raspberry Pi CM4, Gigabit Ethernet, Dual HDMI, Quad USB2.0, PoE UPS Base BoardFeatures 1. PoE UPS Base For CM4: Uninterruptible power supply, powering the CM4 while recharging 2. Connecting With Compute Module 4: Standard CM4 socket and color coded Raspberry Pi 40PIN GPIO header. Suitable For Compute Module 4 Lite EMMC Series Module 3. Uninterruptible Power: It is able to charge the batteries and provide power output for the system at the same time from external power supply. Automatically switch over to batteries output if
Features1. PoE UPS Base For CM4: Uninterruptible power supply, powering the CM4 while recharging
2. Connecting With Compute Module 4: Standard CM4 socket and color-coded Raspberry Pi 40PIN GPIO header. Suitable For Compute Module 4 Lite/EMMC Series Module
3. Uninterruptible Power: It is able to charge the batteries and provide power output for the system at the same time from external power supply. Automatically switch over to batteries output if external power supply is unavailable, keeps the system running without any trouble
4. Multi Power Supply Options:
- Three external power supply options: USB interface, wide voltage DC, and PoE
- When connected to the external power supply, the system will be powered and the battery will be charged at the same time, and the battery will be in a disconnected status after being fully charged, so as to avoid battery life damaging caused by frequently charging and discharging
- When the external power supply is insufficient, the battery will provide power output together with the external power supply at the same time to ensure system normal operation
- When the external power supply is connected, the system will keep running normally even when the battery fails or is taken out. When the external power supply is disconnected, it will automatically switch over to batteries output without interrupting the system operation
5. Safe And Stable Circuit Design: Protection circuits for over charge/discharge, over current, short circuit, and reverse-proof
along with the standalone resettable fuse for each battery, more safe and stable
6. Real Time Monitoring: Monitoring the batteries voltage, current, power, and remaining capacity via I2C. (When the voltage dips too low, it is possible to save files properly and then shutdown the system by software, to avoid any data loss)
Note: The 18650 batteries are not included
Specifications
1. CM4 socket: Suitable for all variants of Compute Module 4
2. Battery support: Parallel 18650 Li-ion battery x 3 (NOT included)
3. Networking: Gigabit Ethernet RJ45 connector, integrates 802.3af-compliant PoE circuit (5V/2.5A)
4. USB: USB 2.0 Type A ?? 4
5. Connector:
- Raspberry Pi 40PIN GPIO header
- M.2 M KEY slot, for connecting NVME SSD, or communication module with PCIE M.2 M KEY interface
6. Display: MIPI DSI port x 1 (22pin 0.5mm FPC connector)
7. Camera: MIPI CSI-2 port x 2 (22pin 0.5mm FPC connector)
8. Video: HDMI x 2, supports 4K 30fps output
9. RTC: Real-time clock with battery socket and ability to wake Compute Module 4
10. Storage: MicroSD card socket for Compute Module 4 Lite (without eMMC) variants
11. Fan: Allows speed adjustment and measurement, 5V / 12V
12. Indicator:
- M.2 status LED
- CM4 status LED
13. Power input7-36V
14. Dimensions: 175.0 x 108.0mm
Specification:
| Package Weight |
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 5
comfortable
Size: 7 Big Kid, Color: Black/Black
super comfortable!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
★★★★★ 5
Great shoes
Size: 5 Big Kid, Color: Navy/Blue
Loved them but bought a size too small so had to buy another pair…my bad 🤦🏽♀️
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Reviewed in the United States on May 20, 2026
★★★★★ 4
Comfortable and Easy to Wear Daily
Size: 2 Little Kid, Color: Navy/Blue
My daughter has been wearing these navy/blue shoes since the weather has been less rainy and more sunny. They are great for outdoor play, especially on days when it's warm outside. The knit mesh upper keeps her feet from overheating, and the cushioned insole feels supportive without being stiff. At size 2, the fit is accurate and the width runs a bit roomy, which gave her some growing room without feeling loose.
The slip-on design with elastic laces and pull tabs is a real plus. She can get them on and off without any help, which she loves. The shoes are light enough that she barely notices them during long active days. My one small complaint is that the sole feels more like firm foam than rubber, so they can be a little slippery on smooth indoor floors.
For the price, these deliver solid everyday value. They look good, hold up well to regular use, and my daughter reaches for them first most mornings.
Pros:
- Breathable mesh keeps feet cool
- Easy slip-on design with elastic laces and pull tabs
- Lightweight and comfortable for all-day wear
- Accurate sizing with a roomy width
- Durable for the price
Cons:
- Sole can be slippery on hard smooth surfaces
- Limited outsole grip compared to rubber-soled shoes
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Reviewed in the United States on June 1, 2026
★★★★★ 5
Great kids' shoe — easy on, comfy all day
Size: 3 Little Kid, Color: Pink/Lavender
My kid has been wearing these for a few weeks now and I'm genuinely impressed with how well they've held up. The knit mesh upper keeps feet cool and comfortable during long days at school and outdoor play, and the cushioned EVA midsole does a great job absorbing impact.
What really won me over is the slip-on design with elasticated laces and dual pull tabs — my child can put them on and take them off completely independently, which is a huge win. The fit is snug but not tight, and they run a bit roomy in width, which is great for kids with wider feet or those who need a little growing room.
At $32, the quality feels solid for the price. Lightweight, breathable, and easy to wear — these check all the boxes for an everyday kids' shoe.
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Cute, Comfortable, Light-Weight Shoes, Perfect for School
Size: 11 Little Kid, Color: Pink/Lavender, Size: 11 Little Kid, Color: Pink/Lavender
These have turned out to be great everyday shoes for my 5 year old. She normally wears a size 10, but since that size wasn’t available, I ordered the 11 expecting her to grow into them. I was pleasantly surprised that they already fit her pretty well. There’s still a little extra room in the toe area, but the shoes fit securely around her ankles so they don’t feel loose or slip off while walking or playing.
She says they’re very comfortable and loves how easy they are to slip on by herself. The lightweight design is nice for everyday wear, and they’ve held up well so far despite being worn almost daily. They've become her favorite shoes to wear! Also the pink/lavender color is really pretty in person. Overall, I’m very happy with them and would order again.
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Reviewed in the United States on May 13, 2026