Raspberry Pi 18650 UPS(Max 5.1V 6A), X728 V2.3 Power Mangement Board With Auto Power On & Safe Shutdown & Buzzer For Pi 4/3B+/3B

[Overview] The X728 is an advanced uninterruptible power supply expansion board for all current models of the Raspberry Pi using a 40 pin header. It provides 5.1V 8000mA Power Backup for even the most demanding Raspberry Pi set ups, intelligent and safe power management , safe shutdown, auto power-on , full poweroff from software , battery reverse polarity protection circuit, and a real- time clock. The X728 reserves the 40-pin header that can be stacked with other Raspberry Pi acceory boards for enhanced applications. The X728 can also be used with the X825 (2.5" HDD/SSD Shield) and X857 / X862 (MSATA/M.2 SSD shield) for safe data backup. [Updateion History] X728 V2.2 , upated on July 7th, 2022: Adds Battery Reverse Polarity Protection circuit & LED indiciators on v2.2 X728 V2.1 , upated on Sept., 27th, 2021: New add a buzzer controled by CPIO20 DC jack is changed from DC5525 to DC5521 X728 V2.0 , updated on Aug., 2nd, 2021: Improve the power path function, the battery will only charge and not discharge when connected to the PSU. You can choose to charge when boot up by short "CHG EN" and stop charging at shutdown. Use ultra-low voltage MCU. Increase battery overcharge, overdischarge protection circuit, added power input surge protection circuit. Added power input connector, which can be used with X715 to achieve 6~60V wide voltage input. V2.0 PCB Size update to 87x63.5mm, the V1.3 PCB size is 85x63.5mm. The battery holder "+" and"-" mark direction has changed compare with X728 V1.3. Please pay attention and follow the directions to insert the batteries. X728 V1.3 , updated on February, 2021: V1.3 removes the ASD harware function and adds power surge protection function, but we new add the software shutdown python script when battery is low voltage, please rerfer to X728-Software The charging power indicator (LED1-LED4) is relatively brighter than V1.2. [User Manual]

wiki.geekworm.com/X728

[FOR USE WITH]

Raspberry Pi 1 Model B+/ 2 Model B / 3 Model B / 3 Model B+ / 3 Model A+ / 4 Model B

[OPERATING SYSTEM]

Raspbian Stretch

Safe shutdown function tested for Raspbian, other operating syst to be tested and advise

[Specification]

Power supply via Type-C socket : 5Vdc ±5%, ≥3A, Via DC power jack : 5Vdc ±5%, ≥4A

UPS output : 5.1V ±5% Max 6A

UPS charging current: 2.3~3.2A

Terminal Battery Voltage : 4.24V

Recharge Threshold : 4.1V

Note: Do not apply power to your Raspberry Pi via the Micro USB socket or Type-C socket. Do not use 18650 battery with built-in protection circuit [Packing List] Bundle 1:

1 x X728 Expansion Board

8 x Screw M2.5 *5mm

4 x Spacer M/F M2.5 *20mm

4 x Spacer F/F M2.5 *20mm

2 x Jumper link Pitch 2.54mm

Bundle 2:

1 x X728-A1cooling fan board

1 x Screw pack

Bundle 3:

Bundle 1

1 x X728-A2 Battery Holder

1 x Screw pack

Bundle 4:

1 x X728 Expansion Board

1 x Heatsink with Cooling Fan（With 4x Copper pillar m2.5*14+4)

1 x Power adapter -EU Plug

Bundle 5

1 x X728 Expansion Board

1 x Heatsink with Cooling Fan（Screw Pack: 4x Copper pillar m2.5*14+4)

1 x Power adapter -US Plug

[X728]

Smart and powerful Uninterruptible Power Supply (UPS)

Provides continuous operations for up to 10~30hours (depending on battery type and qty used)

Max 5.1V 6000mA Power Backup for even the most demanding RPi set ups

Can work with X728-A2 stackable 2-cell battery holder to increase battery capacity

Supports 3000mA fast battery charging

Integrated over current protection and over voltage protection

Integrated Maxim's -gauge syst (Reading battery voltage and percentage via i2c)

Integrated 10-A fully-integrated synchronous boost converter

Intelligent automatic charging and discharging

On-board 4 green LEDs indicate battery charging and discharging levels of 25%, 50% , 75% and 100%

Intelligent and safe power management

Equipped with momentary on for easy power control

Pre the on to turn on

Pre the on and hold for 1~2seconds to reboot

Pre the on and hold for 3~7seconds to implement safe shutdown

Pre the on and hold for >8seconds to force shutdown

Supports safe shutdown and full poweroff through software

On-board blue LED shows the status of power on, reboot and shutdown

On-board pin header allows to select auto power-on when power supplied

Ultra-low standby power consumption to maximize battery life

Operate in both charge mode and boost mode to allow full system management and battery power management

Integrated IN-to-SYS pa-through path to pa the input voltage to the system

Advanced system power-path management avoids batteries frequent charging and discharging

Advanced system power-path management allows 3A fast charging and powering Raspberry Pi at the same time

Integrated Hardware DS1307 Real Time Clock (RTC) with Battery Back-Up

Keeps track of the time while the Raspberry Pi is switched off

Allows the Raspberry Pi to retrieve the current date and time when it is switched back on

Uses the 18650 battery to maintain the date and time - no additional battery required

Powers the Raspberry Pi via the 40-pin header - no additional cabling required

On-board DC power jack (5.5*2.5mm) and Type-C socket convenient for power input

On-board PH2.0 connector allows to connect external power switch and DIY your perfect case

On-board XH2.54 power output connector allows to power other devices

Reserves the 40-pin header that can be stacked with other Raspberry Pi acceory board

[X728-A1]

X728-A1 Optional Raspberry Pi cooling fan

Completely solve the overheating problem of your Raspberry Pi

Efficient drop temp of your Raspberry Pi by using the X728-A1

Stackable design allows you to connect both X728 and X728-A1on your Raspberry Pi

On-board XH2.54 power output connectors allow to power other devices

Reserves the 40-pin header that can be stacked with other Raspberry Pi acceory boards

[X728-A2]

X728-A2 Optional 18650 2-Cell battery holder

Stackable 18650 two cells lithium Ion holder

Ideal solution to increase battery capacity

Integrated battery protection circuit

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