Koalas sleep for 20 hours each day because of their slow metabolism. These marsupials must maintain slow metabolic rates to conserve their energy. Koalas slow their metabolism by lying motionless on trees before they doze off. This inertia is similar to how hibernating animals behave during winter. Many hibernating animals also need to conserve their energy. They save their energy by moving as little as possible or not at all and slowing their metabolism.
True to their name, nocturnal sloths sleep for about 15 hours each day, typically spending their daylight hours resting in thick trees and becoming active at night. Sloths sleep for an impressive amount of time each day in shaded places. This behavior helps maintain a stable body temperature which they cannot regulate themselves.
Interestingly, their fluctuating temperature accompanies a slow metabolic rate and is the reason sloths move slowly through the trees to conserve energy. Overall, the unusual sleep behavior of sloths reveals just how complex and specialized their bodies are.
edit: meant in general, not just amazon, added other
Any site you go with, I would make sure to triple check labels, reviews, warranty of laptop and the one offered by website.
Maybe more expensive, but warranty for a year, Newegg/Amazon/other also has some, and the one you mentioned.
Random search brought up Newegg:
NOTE: There are 3 different batteries for your Dell laptop model and they are NOT compatible, please compare your original battery with our photos to make sure it can fit. Type: Lithium-Ion Technology Voltage: Fit 7.6V Dell laptop Capacity: High Performance 62Wh Cell: Premium Quality 4-Cell Warranty: Full One Year Compatibility: 100% compatible with specific laptop models, ensuring a perfect fit and seamless performance. CE and RoHS Certification: Certification ensures that the battery complies with safety and environmental standards Long-Term Reliability: Our batteries are engineered for durability, with a focus on maintaining consistent performance over time.