Pi Zero W Battery Powered USB Hub

Name: Pi Zero W Battery Powered USB Hub
SKU: 24710
Price: 13.99 USD
Availability: InStock

Battery powered USB hub extension board for the Pi zero W

Designed by imuslab in Hong Kong

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$13.99

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Battery powered USB hub extension board for the Pi zero W

What is it? This is a battery powered USB hub for the Pi zero W. It might also work with other pi zero form factor boards that has bottom test pads for USB D+, D- and power 5V / GND. Quick Showcase …

What is it?

This is a battery powered USB hub for the Pi zero W. It might also work with other pi zero form factor boards that has bottom test pads for USB D+, D- and power 5V / GND.

Quick Showcase Video

https://www.youtube.com/watch?v=eyJz5iCwuvg (The video showcase the older version with a micro USB charging port, the current version features a type C charging port instead)

Notes before buying

Raspberry Pi zero W, Micro SD card and LiPo battery not included
Require a bit of soldering skills to make it work

Specification

HT4928S Lithium polymer battery management IC (Input: 5V 0.8A, Output: 5V 0.8A, up to 91% conversion efficiency)
SL2.1A USB 2.0 Hub
3 X USB 2.0 Type A port for connecting USB storage devices, WiFi adapter and power (from battery)
1 x USB type C port for charging (5V 0.8A)
White indicator LED, blink while charging and low battery, turn on when discharging with internal regulator.
Size: 113.5mm x 36.6mm x 8.5mm (thickest point)
PCB: 1.5mm Green silk with lead
Connection: This adapter board contains 4 pins for connecting to the USB D+, D-, 5V and GND test pad on the bottom of the Pi zero W

Features for hackers

The 4th USB port is implemented as test pads (between the USB port and the power switch) for future upgrade / extension
Provide test pins (2.54) for both USB host and battery, allowing the use of other similar form factor ARM SBCs (e.g. Banana Pi M2Zero)

Battery Choice

Recommend LiPo battery that is rated for 3.7 - 4.2v (1C).

You can also use 18650 with protection circuit built in or old smartphone LiPo battery with protection circuit built in. In the sample build above (and in the video), it uses 2 x 1100mAh LiPo with internal protection & balancing circuit. It runs for around 10 hours with WiFi on and no external USB device plugged in.

Why did you make it?

I made this for my personal project called "Pocket Cloud Server" with ArozOS. This also serve a great platform for using Pi Zero W in off-grid deployment like during conference / Maker Faire demo.

What makes it special?

Ultra thin form factor (< 1cm even with the Pi zero W soldered on)
Work with any LiPo / 18650 at 3.7v - 4.2v range
Type C port for charging
SL2.1A as USB Hub controller instead of the cheaper FE1.1S, less heat = longer run time
Physical power switch

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imuslab Shipping Policy:

For shipment to US, if you are buying light-weight items, it would generally be cheaper if you buy multiple items as US Postal charge the same for a parcel under 500 grams.
Chunghwa Post NO LONGER SHIP to Serbia and Iceland. Some of my products are ship from Taiwan and the rest are from Hong Kong. Please avoid purchasing the items ship from Taiwan if you live in the above countries. Thanks for the understanding!
Products are usually ship-out on Monday or Tuesday
If you have any questions or inquiry, please email to imuslab@gmail.com. DO NOT USE THE TINDIE MESSAGE / CONTACT SELLER FEATURE, as Tindie message tool is kind of buggy and seller won't get notification for a new message.