Developers or hobbyists searching for a Raspberry Pi UPS expansion board complete with real-time clock (RTC) and 5V output serial port may be interested in the UPS-18650 now available via Tinder for just under $30. The Raspberry Pi power expansion board offers an easy way to provide power direct to your mini PC when a mains supply is not available and is powered by two standard flat head 18650 lithium batteries.
“UPS-18650 is a UPS power supply specially designed for Raspberry Pi (hereinafter referred to as pi). It is powered by two standard flat head 18650 lithium batteries (cells without protection board), and supports external power supply insertion detection. When charging the external power supply, the pi is powered by an external power supply. When the external power supply is unplugged, the pi is seamlessly powered by the lithium battery.”
“The UPS-18650 is connected to the pi motherboard via 10 high-current thimbles, so the pi does not need to be connected to the UPS-18650 with a micro usb cable. In addition, UPS-18650 also integrates professional power meter chip MAX17040G, RTC real-time clock chip DS1307Z+, USB-to-UART serial port chip CP2104, power indicator, and additional 5V output port for external devices.”
Features and specifications of the Raspberry Pi UPS :
– Charging current: max 1A@5V
– Output current: max 3A@5V (using two 3300mAh 18650 lithium batteries or external power adapter
– When the rate is greater than 5V3A)
– Electricity measurement: output battery percentage, error ±1%, voltage measurement error is ±3mV, measurement error varies from battery to battery