APPLE 15-inch Aluminum PowerBook G4 Series Battery,Replacement for APPLE 15-inch Aluminum PowerBook G4 Series Laptop Batteries Pack
APPLE PowerBook G4 battery,APPLE 15-inch Aluminum PowerBook G4 Series battery,Replacement for APPLE 15-inch Aluminum PowerBook G4 Series Laptop Batteries for sale.
It not only by the series / parallel connection of several batteries of the circuit itself also includes two substrate modules: Apple Laptop Battery the protection of the circuit substrate (Protection PCB) module and the Smart Battery Gauge Board module, and its set of battery design,M8403 Battery, M7318 Battery, PowerBook G3 Battery, PowerBook G4 Battery,including the first-class protection protection IC (to prevent dell laptop battery overcharge, over-release, short-circuit), the second-level protection IC (the second time to prevent over-voltage), fuse, LED instructions, such as temperature regulation components.
In the multi-level protection mechanism, even in the power charger, the computer result in an anomalous situation, the dell inspiron e1505 battery can only be converted to automatic protection status, if the situation is not serious, tend to re-plug in after the normal work can not explosion occurred.
According to analysis, lithium batteries from short circuit or explosion had sufficient cause,PowerBook G4 Battery, the greatest possibility is in the manufacture of lithium batteries, (dell gd761 ,dell kd476 ,dell td347)because of manufacturing process itself flawed, of products that may occur at any time there is a potential safety problems, such as should be insulation between the two poles of metal dust or copper foil and aluminum foil diaphragm perforation of the burr, resulting in micro-short circuits. The former situation is most serious, M8403 Battery, M7318 Battery, PowerBook G3 Battery, PowerBook G4 Battery,will be the direct result of a large number of short-circuit and heat production, resulting in vaporization of some of the electrolyte, the battery casing stretch.
So that the dell E1505 battery will not be harmed by the loss of protection, over-filling around the posterior pole piece on the crystallization of lithium metal needle, piercing a number of micro-point lead to short-circuit, causing the battery temperature gradually increased, M8403 Battery, M7318 Battery, PowerBook G3 Battery, PowerBook G4 Battery,until eventually the battery explosion, fire phenomenon, which notebook battery is a lot of "hot" factors.
At present, the protection mechanisms from the point of view, the rechargeable battery pack in front of the traditional programs offered by the chip manufacturers are played most precise control of charging voltage and charge current role in the over-voltage and over-current control and did not provide the appropriate solution program. In this way, the protection of the battery pack is entirely dependent on the battery itself, such as over charge protection, over discharge protection, over-charge protection,M7318 Battery,over-current protection in place, over-temperature protection and so on.
Protection in place because of the need to prevent the first-level protection IC or MOSFET short-circuit fault caused by over-voltage fault, so the second-level protection IC will normally be considered is the battery pack to protect the last line of defense.