Choosing between lithium-ion (Li-ion) and lithium-polymer (LiPo) power banks depends on your needs. Li-ion batteries are generally more cost-effective and have a higher energy density, meaning they offer more battery life for their size, making them a popular choice for high-capacity power banks. However, they can be more prone to overheating and have a shorter lifespan. LiPo batteries are lighter, more flexible in terms of shape (allowing for slimmer designs), and have a lower chance of leaking electrolytes, making them safer. They typically have a longer lifespan and suffer less from wear over time but might come at a higher cost for the same capacity. If you prioritize safety, design, and durability, LiPo is the better choice. For better cost-performance ratio and capacity, go with Li-ion.

Yarn is a package manager for JavaScript, designed to improve upon existing workflows around the npm client. It was developed by Facebook in collaboration with Exponent, Google, and Tilde to address performance and security shortcomings in npm. By caching every package it downloads and parallelizing operations, Yarn is able to provide faster and more reliable builds. It uses a 'lockfile' to secure the versions of all dependencies, ensuring consistent installations across different machines and environments. This feature is particularly beneficial for large-scale projects that require exact versions of packages to maintain compatibility and functionality across diverse development and production setups. Additionally, Yarn offers a cleaner and more intuitive user interface than npm, making package management simpler and more efficient for developers.

Yes, cellulose is a polysaccharide, which is a type of carbohydrate consisting of a large number of glucose units joined together by glycosidic bonds. It is the most abundant organic polymer on Earth, serving as the primary structural component of the cell walls in green plants, algae, and oomycetes. Unlike other polysaccharides such as starch and glycogen, which serve as energy storage molecules in plants and animals respectively, cellulose provides structural support. This is due to the way in which the glucose units are linked together, resulting in a linear chain that allows the formation of strong fibres. Humans cannot digest cellulose due to the lack of an enzyme called cellulase, which is needed to break down the beta-1,4-glycosidic bonds. However, it plays a crucial role in the human diet as dietary fiber, aiding in the digestive process. Cellulose is not only significant in the biological realm but also has immense economic importance in the textile (cotton), paper, and biofuel industries.