Different

Peoples ask me, what is the different between original battery pack and third party battery pack? Honestly, I do not like to answer this question, that is strictly depand on the price you pay for, it is a matter of demand and supply.

Today I open one Dell D620 replacement battery that cost you around RM230 to let you examine it youself, I know consumer do not or never open it and see it for yourself.


Picture below show, the red retangle is the protection board of third party battery, only one controller inside! The blue retangle in original battery, there are 3 integrated circuit inside, one fuel gauge, one analog font end and one second level back up protection!

Some people may ask, why we need three while we can only use one? At the begining, the largest fuel gauge company actually try design the protection board with only one IC, but many manufacturer found that it is not safe enough, as IC can fail to operate under some circustances, such as aging, power surge, high tempereture or others reasons. Therefore, everyone design the protection with more than one layer of protection for long term safety.


Picture below, original battery use 3 pin fuse, the third party battery use 2 pin, 3 pin fuse can be cut off by the small second level protection ic, the small eight leg ic work independent not rely on the main circuit. Therefore if something wrong with the main circuit, it do not sense any dangerous critical operation, the second level protection will cut the fuse to shut the circuit down so no more current flowing into or out from the battery pack. This fuse will also melt when the mosfet is overheat, mean that there are over current(usually short on the output) but the main circuit and second level protection circuit do not shut it down.

Picture below show that the cell use inside original(LG chemical, Korea) battery and third party battery, both last 1.5years, but the original battery have been discharge more cycles then the third party one, in this customer usage, the third party only been discharged 37cycles and last only half an hours currently.

While my repacked battery is using ORIGINAL PROTECTION BOARD plus HI QUALITY BRANDED CELL which are purposely design for notebook battery pack! At the same price you pay, you get some thing twice or triple time lasting!!!