Apple just released its Apple Watch joining a growing list of manufacturers of new smart watches, including Samsung, LG, Motorola and others. These watches include, in addition to timekeeping, features such as messaging, basic email, navigation, in some cases voice calls, health & sports monitoring, as well as a slew of growing apps that seem […]
Ok, ok, I should not be joking about the name. Safety is a serious matter. But let’s talk honestly today about dishonesty. Ultrafire is a China-based vendor of 18650 lithium-ion cells. One can buy their 18650 cells from eBay, Amazon and lots of other web-based stores. I was intrigued last week when I saw on eBay […]
We have covered in prior blogs the operation of batteries in smartphones. The vast majority of such devices use single-cell batteries. In other words, there is one physical cell that is the battery. As such, it has a given charge capacity measured in mAh or Coulombs, and it has a voltage range that is between […]
NASA landed in July 1969 the Apollo 11 on the surface of the moon. Along with the famed astronauts was the Apollo Guidance Computer (AGC), a 1960s-era computer to navigate the spaceship to the moon and back. A reliable machine for its time, it stands today only as a relic. A modern smartphone, for example […]