A battery charger is a device that powers energy into a cell that forces electrical current through a contained unit. The charge current depends on a number of different variables, the capacity, the technological ability, and the maker of the charger. The type of current varies from charger to charger. An example would be the charge of current you would use to charge a car battery would be different than the type of charge one would use to charge an iPod. A simple type of battery chargers connects a DC-power source that distributes energy to the battery that is being charged. This type of charger is referred to as a simple charger because it does not change its output value based on time or when the battery is being charged. These chargers are typically inexpensive and easy to find, but there is a draw back it takes longer for a simple charger to charge a battery, because charging the battery to quickly could cause severe over charging. Also, if the battery sits on the charger for too long the constant flow of energy from the DC-power source can cause over charging, which can weaken or destroy the battery. Trickle or float battery chargers are simple battery chargers that charge the battery slowly, at the self-discharge rate. This makes the trickle charger the slowest of any other type of chargers, but the battery can be left on the charger for any period of time because the charger is incapable of over charging the battery. An intelligent battery charger monitors the batteries charge, time under charger, and temperature to insure maximum charge without over charging, so the charge is terminated when the voltage and temperature of the battery indicates optimum charge. Typically an intelligent charger will charge a battery up to 85% of its maximum capacity, then switching to trickle charging to finish the charge and to insure that battery isn't damaged. A fast charger uses the control circuitry in the battery to indemnify that the batteries cells are not spoiled. A fast charger is named after is convenience and speed, being such a fast charger most come with a fan to keep the cells temperature from being detrimental to the battery. Most fast chargers are capable of overnight charges as long as the battery does not have special control circuitry. Chargers that use pulse technology to safely charge cells are called pulse chargers. Pulse chargers are compatible with any size, voltage, capacity or chemistry of batteries, including automotive and valve-regulated batteries. Chargers that use pulse technology use a pulse of energy to check the batteries current state, then incorporate fast technologies until the battery is close to being charged then use trickle technology to finish the charge safely. Inductive battery chargers use electromagnetic induction to heal the batteries cells. A charge stations send electromagnetic waves through inductive coupling into an electrical device, where the batteries energy is housed. This type of battery charging system is popular in electric toothbrushes and other toiletry devices because there is no risk of electrocution. Charging technology has nearly been perfected in time speed and safety of charge. This makes charging very convenient and fast. All these styles would be a good choice.
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