Laptop batteries come in three main types: lithium-ion (Li-ion), nickel-cadmium (NiCd), and nickel-metal hydride (NiMH). NiCd batteries are the oldest and least efficient. They hold a charge for only a few hours and suffer from the memory effect, which reduces their total capacity if not fully discharged before recharging.
A laptop battery consists of multiple cells, often described as four-cell, six-cell, or more, which determine its overall capacity. Problems can arise in just one cell or several, affecting performance. Modern laptops rarely have removable batteries, making repairs or replacements more challenging. Just like with the Dyson V7 battery in cordless vacuums, understanding the internal structure and care requirements of lithium-ion packs helps extend their lifespan and maintain performance.
Tech reviewers, like Andrew Cunningham, regularly test a range of laptops—from ultrabooks to gaming machines—providing guidance on which models and battery types best suit different needs. When choosing a laptop, understanding battery type, cell count, and capacity can help you select a device that balances performance, portability, and battery longevity.
