Is the recharge threshold and terminal battery voltage adjustable? I want to keep the batteries between 80% and 20%

No. I don't think this is possible, unlesss you write a script that monitors the voltage or % of charge, and open a relay that would cut off the power input to the system... You would need some external equipment (arduino?) for that.

Are the batteries hot-swappable? In other words, can I connect an external power supply and swap the batteries out while that is on?

Hi friend, Sorry that the X728 on board 18650 batteries does not support hot-swappable, please swap the batteries after power cut off. best regards, Geekworm Team

Does the rtc have a separate battery? or does it run on the 18650 batteries? what happens if you remove them? will it "lose" time?

Hi friend, The RTC function runs on the 18650 batteries. It will "lose" time if you remove the 18650 batteries. best regards, Geekworm Team

Can I use more than two batteries with the x728?

It holds two batteries, it does have an second input for more battery boards.

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Geekworm for Raspberry Pi UPS, X728 (Max 5.1V 6A) UPS & Power Management Board with AC Power Loss Detection|Auto Power On|Safe Shutdown|Battery Capacity Reading|Low Battery Auto Shutdown|Buzzer

Product ID: 371701206

Details

Battery cell composition
Lithium Ion
Brand
Geekworm
Colour
X728
Product dimensions
85D x 35W x
Voltage
5.1 Volts

⏰Built-in RTC & safe auto shutdown

⚡Max 5.1V 6A output power

🔋Supports Lithium-Ion battery backup

€ 94.99

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Description

🔌 Power your Pi like a pro—never lose a byte or a beat!

SMART POWER MANAGEMENT - Auto power-on, safe shutdown, and low battery auto-off ensure your projects stay protected and hassle-free.
COMPACT PROFESSIONAL DESIGN - Sleek plastic enclosure fits perfectly in rack setups or mobile labs, optimized for cable management and durability.
REAL TIME CLOCK BUZZER ALERTS - Stay informed with integrated RTC and buzzer alarms for power loss and battery warnings—never miss a beat.
STACK EXPAND YOUR PI ECOSYSTEM - 40-pin header reserved for stacking with HDD/SSD shields and other accessories—future-proof your setup.
UNINTERRUPTED POWER ALWAYS READY - Keep your Raspberry Pi running seamlessly with 5.1V/6A power backup—no more sudden shutdowns or data loss.

The Geekworm X728 UPS board delivers robust 5.1V 6A power backup for Raspberry Pi 4B/3B+/3B, featuring intelligent power management with auto power-on, safe shutdown, battery capacity monitoring, and AC power loss detection. Designed for seamless stacking with other Pi accessories, it ensures uninterrupted operation and data safety in professional and mobile environments.

Specifications

ASIN	B087FXLZZH
Amperage	6 Amps
Battery Cell Type	Lithium Ion
Best Sellers Rank	#27,729 in Computers ( See Top 100 in Computers ) #41 in Computer Uninterruptible Power Supply Units
Brand	Geekworm
Color	X728
Connector Type	Type-C, DC jack
Customer Reviews	4.2 4.2 out of 5 stars (86)
Enclosure Material	Plastic
Form Factor	Rack
Input Voltage	5 Volts
Item Dimensions	8.5 x 6.4 x 3.5 centimeters
Item Dimensions D x W x H	85D x 35W x 64H millimeters
Item Weight	0.06 Kilograms
Manufacturer	Geekworm
Maximum Power	30.6 Watts
Mfr Part Number	TB-2019-71
Model Number	X728
Number of Items	1
Number of Outlets	1
Output Current	6 Amps
Output Voltage	5.1 Volts
Output Wattage	30.6 Watts
Power Plug Type	No Plug
Runtime	30 hours
Unit Count	1 Count
Voltage	5.1 Volts
Wattage	30.6 watts

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€ 94.99

Duties & taxes included

In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Austria.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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