Digital camera battery charger optional note

Digital camera battery charger brands and manufacturers, are unable to breakdown, and some quality of the product is really people boast about. Sometimes the battery can not be fully satisfied only green light, poor battery chargers for digital cameras and is also a great harm. The following lists the characteristics of the charger and Buying Considerations:

1 good quality lithium battery charger can identify with nickel-metal hydride batteries, thereby determining the charging mode (lithium battery protection circuit board has an integrated data storage characteristics of lithium batteries, which on the one hand to be able to identify lithium battery charger, to determine the "constant current" and "constant voltage" charge mode; hand also allows digital cameras to identify lithium battery, in order to determine the discharge mode and call status).
2 Ni-MH battery charging method using "constant current." NiMH batteries are not afraid of overcharge itself, when the nickel-metal hydride battery overcharge will reverse reaction, in order to prevent excessive voltage rise, this reaction can cause the battery slight fever. In addition, the nickel-metal hydride batteries are usually added with a thermistor to prevent the battery from overcharging. Currently, most digital cameras operating voltage is about 3.6V, it takes three nickel-hydrogen battery cells. The general NiMH battery cell overcharge to about 1.4-1.5V or so stops, three maximum voltage of about 4.4V battery.
3 due to battery overcharge be dangerous, so the setting of charging and discharging conditions than nickel-cadmium batteries and nickel-metal hydride batteries have harsh. Internal lithium battery usually attached to a control circuit board to prevent overcharging. According to the characteristics of the lithium battery design, the first paragraph of charge on a "constant current" mode charging, fast charging full time until then to "constant voltage" (between about 4.1-4.2V) Charging way to achieve optimal battery condition. Some market cradle jerry identify all the digital camera batteries into nickel-hydrogen batteries, but the "constant current" mode charging, they often lead to excessive battery charging. Good quality of lithium battery protection circuit board at this time will be protected to prevent the charger to continue charging. If they are poorly designed circuit board, not only unable to protect the battery, causing the battery from overcharging, may also be due to overcharging the battery cell deformation, leakage, explosion, etc.
4 mostly used commercially available rapid charging cradle, usually in 3-4 hours already filled. When the charger shows charging is completed, if not remove the battery from the charger, it only very weak battery into the battery.
5 nickel-metal hydride battery memory effect is not large, often without discharge, lithium is basically no discharge. Chargers on the market, and its accompanying discharge device of varying quality. Poor quality will over-discharge phenomenon, easily causing corrosion of the negative electrode plate inside the battery (nickel-hydrogen battery electrolyte inside the alkaline solution of potassium hydroxide), thereby reducing the battery life and capacity can be used normally. In this case, each of the first discharge, then recharge the battery will be bad faster. Under normal circumstances, as long as the one used in the battery charging automatic shutdown and then go, that is the best on the battery discharge treatment method.