The 18650 cell has become the workhorse of the lithium ion battery industry and is a good candidate for analysis of most lithium ion batteries properties. Tesla automobiles, laptop computers, e-cigarettes, scooters, and grid energy storage all use the 18650. The 18650 cell is a leader in cost reduction, stored energy has been continually increasing and over 2 billion cells were manufactured in 2016. Lithium ion cells are truly a marvel of chemistry and electrical engineering.
Discovering end-to-end request-processing paths is crucial in many modern IT environments for reasons varying from debugging and bottleneck analysis to billing and auditing. Existing solutions for this problem fall into two broad categories: statistical inference and intrusive instrumentation. The statistical approaches infer request-processing paths in a "most likely" way and their accuracy degrades as the workload increases. The instrumentation approaches can be accurate, but they are system dependent as they require knowledge (and often source code) of the application as well as time and effort from skilled programmers.