As more systems go mobile, batteries are becoming increasingly integral to design. They come in all shapes, sizes, and capabilities but no single one is perfect for all challenges.
There are huge differences between chemistries, and a lithium-ion may not always be the right solution. In this article we will walk through a comparison of nickel metal hydride, lead-acid, and lithium-ion batteries looking at the benefits of each and the unique areas in which they excel. I am going to work backwards through the chemistries going from least energy dense to most dense by weight. Energy density is usually measured in Wh/Kg or Wh/L giving us the amount of stored energy by weight or volume.
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Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
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