As technology evolves, so have the methods for replenishing and maintaining life in one's energy source. Over the past few decades, many new charging technologies have been developed – including beta, ni-cd, nickel-metal-hydride batteries even lithium ion cells. At that point in time the nickel-hydroxide and cadmium were seen as most suitable for appliances with low power demands such as radios and cordless phone handsets. But now our own advanced research and development teams say that this is likely to change in the near future. One of the most interesting trends in this industry is growth of R&D where heavy investment is needed but there are no libraries of certified, borings reports to consult. The 12 volt li ion battery charger is a complex piece of technology that as a tool can quickly and safety charge lithium ion batteries. Its main functions include delivering a constant current to the battery until it reaches full charge, at which point it switches over to a small charge (a trickle charge) that maintains the battery's charge level over time. Safety mechanisms that come with multiple technological features prevent overcharging, over-discharging, and short-circuiting. This ensures not only the battery's long life but also user safety. These chargers are equipped with smart technology that senses the battery's voltage and then effectively changes the charging current to an appropriate level. Such flexibility makes them suitable for a wide range of applications, from automotive and marine uses to power tools and electronic equipment.