LifePO4 Mini/Pro 3.3V or 6.6V Battery Power supply

LifePO4Mini Pro 3.3V Introduction

Released in Nov 27,2025, LifePO4MiniPro 3.3V is a very well-designed next generation advanced pure battery power supply. It has a lot of new features and would be a big step forward upgrade over the current LifePO4 Mini series.

LifePO4MiniPro 3.3V employs four 18650 battery cells in parallel to get a up to 8000mAH capacitance with extremely low output ESR. With the USB-C PD protocol, 12V/9V fast charge mode will be enabled when a qualified USB power adapter is connected. Even more, a Super-Pure Mode (UPS mode) is first time being introduced to run it as an AC/DC input free ultra-pure battery power supply for evaluation and other noise sensitive applications.

LifePO4MiniPro could be so far the best battery based 3.3V ultra-low-noise and high dynamic power supplies in the real world. Because it is a pure passive power supply, there will be no feedback and no active components being involved. Sound quality of sensitive audio applications such as low jitter clock oscillators, DACs, FIFOs and many other circuits will be benefited from this LifePO4 Mini pro power supply.

With this new state of art LifePO4 Mini Pro 3.3V power supply, many high-end digital audio DIY projects can be built in a more professional way and more improvement will be expected.

LifePO4Mini Pro 3.3V Specifications and Highlighted Features

● 8000mAH  (4 18650 LifePO4 battery cells, two sides mounted)

● Capable of 12A continuous and 50A dynamic output current

● Real measurement output ESR results @1kHz:
   6.1mOhm (Fuse bypassed)
   8.9mOhm (With the default 12A resettable fuse)

● In pure mode, outputs will be 100% isolated from the input. Ground loop will be cut off

● Can use either AC 6-12V or USB-C DC as power input

● With the built-in USB-C 12V/9V PD protocol for fast charge mode

● Super-Pure (UPS) mode, can provide pure battery output even without power input.

● Ultra-low ESR resettable fuse no longer need for fuse replacement

● Low ESR independent output connectors for both positive and negative terminals

● Both internal and external ON/OFF switch.

● ON/OFF control chain input (isolated) and output

● SYNC charging IN/OUT (isolated)

● Low current (100mA) AUX 5V output to provide an additional 5V output 

● Fixed 3.3V output

● Can be upgraded to ultracapacitor/battery hybrid power supply when work with a UcConditionerPro 3.3V or UcHybird (lower cost).

● Has both switched and continuous outputs

● Protection mode to prevent battery cells from exhausted or low output voltage

● Four layers PCB design with two more layers for low-ESR and high-current trace and additional low-noise shield

● Lower profile design suitable more to the project

● Mounting screw positions are compatible with Pi size PCBs

● Precision manufacturing

● Heavy duty design for 24/7 operation

New LifePO4Mini Pro 3.3V comparison

LifePO4Mini Pro 3.3V User's manual

Note:

1. Please be very very careful not to reverse installation the batteries.
2. 18650 LifePO4 battery cells are sold separately but can ship to Canada and USA only
3. #34D 25mm M2.5 standoff set might be required to mound the LifePO4 Mini Pro power supply

LifePO4 Mini 3.3V and 6.6V

Introduction
LifePO4 Mini 3.3V or 6.6V is a low cost high performance pure battery power supply. It makes use of the 26650 LifePO4 battery cells to achieve a great power supply performance. Because it is a pure passive power supply, there will be no feedback and no active components involved when it’s t urned on. At the pure output mode, only the fully charged battery cells will be applied to the load. Batteries capable of delivering up to 240A dynamic current with less than 3 mOhm internal ESR (continuous output mode, two battery cells in parallel ). It could be so far the one of the best low noise and ultra high dynamic power supplies in the world. Sound quality of sensitive audio applications such as low jitter clock oscillators, DACs, FIFOs and many other circuits will be benefited from this LifePO4 Mini power supply.

Specifications and Highlighted Features

• Pure LifePO4 power supply
• Low cost but no compromise on performance
• Pure output works in class A mode with battery current goes only in one direction
• Fixed 3.3V or 6.6V output
• Has both switched and continuous (great for clock oscillators) outputs
• Outputs are 100% isolated from charger, input and the rest of circuit s when it is turned on at pure mode
• Has built in on/off control switch (on board or external)
• Has an isolated on/off control management chain that can be set up in a power supply group
• Optical isolators are used for all internal operating logics.
• Can use both AC and DC as input
• Built in protection scheme to prevent battery cells from exhausted or low output voltage
• Dynamic output current: up to 240 A (A123 ANR26650 M1B
• Battery ESR: Less than 3 mOhm (Two A123 ANR26650 M1 B battery cells in parallel
• Ultra low output noise: Only decided by the battery cells
• Heavy duty design for 24/7 operation

Note:

1. For #42A LifePO4 Mini 3.3V, Please use USC-C J6 as input. Or it your want to use J2, the input range will be AC 4-5V or DC5.5-6V. Please neve go higher than that range (PCB silkscreen ranges could be wrong).
2. For #43A LinfePO4 Mini 6.6V, please use DC12V -18.5V as input, DC9V may not be enough. You can also use AC12V. The voltage range in the User's manual or on PCB could be not all corrent.

LifePO4 Mini 3.3V user's manual

LifePO4 Mini 6.6V user's manual

Documents

https://github.com/iancanada/DocumentDownload/tree/master/LifePO4Mini