Phone charger brands and manufacturers can be said to be endless, and some quality of products cannot really be commended. Sometimes the battery can not charge full and green light cannot light, low-quality charger is also a great harm for cell phones and battery. The following I list chargers (mainly non-original equipment products) and the note for purchase :
Good quality cradle can identify lithium and nickel hydride batteries, and then decided the charge mode (Li-ion battery protection circuit board has an integrated data storage characteristics of a lithium battery, which on the one hand to cradle to identify lithium batteries, in order to determine "constant current" and "constant voltage" charging mode; the other hand, can make cell phone identify the lithium batteries, to determine the discharge method and call status.)
Charging method of Ni-MH battery uses "constant current." Ni-MH itself is not afraid of overcharge, when the Ni-MH battery overcharge , the reverse reaction will be to prevent excessive voltage rise, this reaction causes the battery warm. In addition, the Ni-MH batteries usually have a thermal resistance increases to prevent the battery from overcharging. At present, most cell phones around the operating voltage is 3.6V, so the need to three nickel-hydrogen battery cells. General overcharge NiMH battery cells to about 1.4-1.5V so that stopped, three maximum voltage of the battery is about 4.4V.
The lithium battery overcharge will be dangerous, so the charge and discharge set conditions is harsher than nickel-cadmium batteries and nickel-metal hydride batteries. Additional internal lithium battery is usually a control circuit board to prevent overcharging. According to the characteristics of lithium battery design, first charge on a "constant current" mode charge, fast charge until full again when the "constant voltage" (between about 4.1-4.2V) the battery charging mode to achieve the best. Some cradle cut corners the market to be identified as a cell phone battery Ni-MH battery, and the "constant current" mode charge, they often lead to over-charging lithium batteries. Good quality of the lithium battery protection circuit board at this time will be protected from the charger to continue charging. If they are poorly designed circuit board, not only can not protect the battery, causing the battery from overcharging, and battery (wholesale cell phone accessories) over-charging also may lead to battery cell deformation, leakage, explosion and so on.
Most commercial cradle use fast charging, generally 3-4 hours is already full. When the cradle show charging finished, if not remove the battery from the Charger (cell phone charger), but also only very weak power into batteries. From: cell phone accessories
