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Geekworm UPS HAT Board + 2500mAh Lithium Battery For Raspberry Pi 3 Model B / Pi 2B / B+ / A+ Geekworm UPS HAT Board + 2500mAh Lithium Battery For Raspberry Pi 3 Model B / Pi 2B / B+ / A+ 18,33€ 18,85€ View It
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Redshaw 05/03/2018
This board will probably provide adequate power for a Raspberry Pi 3 provided any additional hats, etc consume virtually no power. I plugged the board onto a Raspberry Pi 3 and plugged it into a 5v power supply and allowed the battery to fully charge. I attached a low power USB drive and then booted into Raspbian with a monitor, mouse and keyboard attached. It booted but I kept getting the low voltage warning on the monitor. I checked the power consumption of my set up by attaching it to a bench power supply and it was just under 2 amps, so the UPS hat should have been able to cope. I then took an oscilloscope to the 5v supply coming from the UPS to the Raspberry and found that it was spiking below 5v. I then disconnected the UPS from the Raspberry and power supply so that it was running purely from the battery. I simulated a load of 0.5A / 500mA as shown in photo (1) at which point the 5v supply had a 100mV ripple but averaged about 5.2v as seen photo (2). I then simulated a load of a little less than 1A (actually 918mA) as shown in photo (3) at which point the ripple became slightly increased and the average voltage dropped to 5v as shown in photo (4). After a few seconds negative spikes started to appear as in photo (5) which I think would be enough to trigger the under voltage warning on the Raspberry and potentially cause issues. To summarize, I would not rely on this board to power anything more than just a bare Raspberry.
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  • Banggood Dear customer,  Thank you for placing order in Banggood. We are sorry for any inconvenience caused by our product. About this product's problem, our customer services will connect to you within 24 hours and they will give you a solution. Please take notice of your email box. We sincerely hope the problem will be solved fast. Best regards, Banggood team  

    24/05/2024

  • jinantha Good review Thanks

    Reply 27/06/2018
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