UPS HAT 5A 4x18650 Battery Board for Raspberry Pi 5

This DFRobot UPS board is screwed under the Raspberry Pi 5 and supplies it via spring contacts (pogo pins) with 5.1 V up to 5 A. It holds four 18650 cells. If the power supply fails, it switches to the cells without interruption and reports the failure to a GPIO; voltage and charge level of the cells can be read via I2C. The board is powered via a 5.5 × 2.1 mm DC jack with 6 to 18 V, and a 12 V 3 A power supply is recommended. Batteries are not included.

Important: According to DFRobot, use only 18650 cells without built-in protection circuit, do not mix old and new cells or cells of different brands, and observe polarity when inserting them. Do not additionally power the Raspberry Pi 5 via its USB-C socket. Do not leave the board unattended on wood or carpet while charging.

Recommended Accessories:

• 12V DC 4000mA Power Supply AC/DC Adapter 5.5mm/2.1mm Plug

Features:

• UPS output 5.1 V up to 5 A, step-down converter with up to 95 % efficiency
• Uninterrupted switching between power supply and cells
• Power loss detection via GPIO6
• Cell voltage and charge level via I2C (GPIO2 and GPIO3)
• Cell charging with 2.3 to 3.2 A, can be disabled via GPIO16
• Protection against overcurrent, overvoltage and reversed cells
• Safe shutdown with empty cells, adjustable threshold; automatic power-on when power returns
• Four LEDs for the charge level, button with the function of the Raspberry Pi 5 power button
• Mounted under the Raspberry Pi 5, leaving room for HATs on top
• Additional 2 × USB-A and 2 × XH2.54 with 5 V, connector for an external power button
• POWER_OFF_ON_HALT=1 and PSU_MAX_CURRENT=5000 must be set in the Raspberry Pi 5 EEPROM, guide in the wiki

Application Examples:

• Raspberry Pi 5 as server or controller with protection against power failure
• Mobile projects such as robot vehicles
• Measuring stations and outdoor equipment
• Clean shutdown on mains failure

Documentation:

• DFRobot Wiki FIT0992
• Software guide: EEPROM, I2C, battery level, power loss (DFRobot Wiki)
• x120x Python scripts on GitHub
• Dimension drawing (PNG)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: FIT0992
• Input: 6 to 18 V DC (12 V, 3 A recommended), 5.5 × 2.1 mm DC jack
• UPS output: 5 V ±5 %, max. 5 A
• Charging current: max. 2.3 to 3.2 A
• Charge termination voltage: 4.23 V
• Recharge threshold: 4.1 V
• Cells: 4 × 18650 (2 holders for 2 cells each)
• Shutdown threshold: default 3.20 V, adjustable 3.00 to 4.10 V
• GPIO: GPIO2/GPIO3 I2C, GPIO6 power loss, GPIO16 charge control
• Charge display: 4 LEDs (100, 75, 50, 25 %)
• Outputs: 2 × USB 2.0 type A, 2 × XH2.54 2-pin, 5 V each
• External button connector: XH2.54 2-pin
• Board: 97.4 × 85 mm
• Weight: 114 g

Scope of Delivery:

• 1× UPS board for Raspberry Pi 5
• 1× screw set