Smart Power Bank Keep-Alive

Name: Smart Power Bank Keep-Alive
SKU: 19004
Price: 14.20 USD
Availability: Discontinued
Rating: 5.00 (6 reviews)

(6 Reviews)

Keep USB power banks alive when powering low-power projects

Designed by OverZ in United Kingdom

Product Retired

This product is no longer available for sale.

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Keep USB power banks alive when powering low-power projects

New version 2! Now more compact and features an additional adjustment for off-time Only 3 modules can be ordered at a time due to extra shipping costs for larger orders. For example, if you would lik…

What is it?

Ever wanted to power a project from a USB power bank, only to have it keep shutting itself off because the current draw was too low? This handy USB module uses a pulsed constant current sink to keep the power bank alive while maximizing battery life!

The smarts of this device is an ATtiny10 which controls the on and off cycling of the constant current sink, since power banks don't normally need a continuous current to stay on. This pulsing technique drastically improves the battery life of the power bank, perfect for powering a small project for a few weeks. The current is adjustable via a small trim potentiometer from 5mA to 150mA and the supply voltage can be anywhere from 1.8V to 5.5V.

More info

Why did I make it?

Because it's hella annoying when your USB power bank doesn't want to stay on!

What makes it special?

Uses an adjustable constant current sink (5mA - 150mA).
Pulses the current to improve battery life. On-time is fixed at 3 seconds and the off-time is adjustable between 1 second and 22 seconds.
Compact with no chunky components.

WARNING: Do not connect the keep-alive module between a QuickCharge/Power-Delivery compatible power source and a QC/PD device, as up to 20V could be present on the power lines which will destroy the module.

Quantity	Price
1-3	$14.20
4+	$100.00

Review Breakdown

Average Ratings

Product: (5.00)

Documentation: (5.00)

Shipping: (5.00)

Communication: (5.00)

Nella | Nov. 17, 2022

Great piece of kit!

Works like a charm. A recent Brexit was trying to get in the way of shipping but the seller persisted and got us the boards.

Antonela | July 7, 2021

Perfect

Just as described, the item works perfectly; 10/10; affordable price; fast shipping to Croatia, thank you!

Sam | March 15, 2021

Great product

It looks to be working great for my project and powerbank! Shipping was pretty good to the US as well. Will buy again.

Gonçalo | Nov. 23, 2020

Properly named

It saved my project!
After hours of trying to tweak the parameters of my Pi's power management hat without success, I found a solution for avoiding my power bank to go into sleep mode.
Super easy to use, just plugged it between my power bank and my Pi with the power management hat and it keeps the power available to the Pi anytime it is needed.

Maximilian | June 11, 2020

Very clever little unit

Works excactly as expected. Easy to adjust with the onboard potentiometer. For outdoor use (I mainly need the powerbank for some accessories of my astronomical telescope) I will probably put a piece of heat shrink tube around it.

Nathanael | June 8, 2020

just works perfect.

Just works perfect. draws nearly no current. ..................................................

+ Show 1 more

OverZ

Nottingham, Nottinghamshire, United Kingdom

Ships from United Kingdom.

7 Reviews | 154 Orders

View Store

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Smart Power Bank Keep-Alive

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Keep USB power banks alive when powering low-power projects

What is it?

Why did I make it?

What makes it special?

Review Breakdown

Average Ratings

Great piece of kit!

Perfect

Great product

Properly named

Very clever little unit

just works perfect.

OverZ

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Five Amp - Power DIY Kit with 12V Power Brick

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