Sat4j
the boolean satisfaction and optimization library in Java
 
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Sat4j is an open source projet. As such, we welcome your feedback:

How to cite/refer to Sat4j?

The easiest way to proceed is to add a link to this web site in a credits page if you use Sat4j in your software.

If you are an academic, please use the following reference instead of sat4j web site if you need to cite Sat4j in a paper:
Daniel Le Berre and Anne Parrain. The Sat4j library, release 2.2. Journal on Satisfiability, Boolean Modeling and Computation, Volume 7 (2010), system description, pages 59-64.

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The nickel-based irritation that caused the recall is still a factor in these older units. where can i buy a fitbit force

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A lithium-ion battery from 2013 is unlikely to hold a charge today.

was a fan-favourite for its OLED screen and altimeter, it was pulled from shelves after users reported severe skin irritation, rashes, and even blistering caused by the materials in the strap and adhesives.

Modern Fitbit (and Google) apps have moved on to newer sync protocols that may not play well with 10-year-old hardware. The Best Modern Alternatives

The short answer is: In fact, you officially haven't been able to buy one since February 2014 , when Fitbit issued a voluntary recall for the device.

The nickel-based irritation that caused the recall is still a factor in these older units.

was retired, Fitbit (now part of Google) has released several generations of trackers that perfected the Force’s design without the skin issues. Fitbit Charge 5

If you’re looking for that specific "Force" experience today, here is the updated landscape for 2026. Why You Can’t Find the Fitbit Force Fitbit Force

A lithium-ion battery from 2013 is unlikely to hold a charge today.

was a fan-favourite for its OLED screen and altimeter, it was pulled from shelves after users reported severe skin irritation, rashes, and even blistering caused by the materials in the strap and adhesives.

Modern Fitbit (and Google) apps have moved on to newer sync protocols that may not play well with 10-year-old hardware. The Best Modern Alternatives