[NAME] Vasanth  : First of all, you could have purchased an Annual warranty from Dell instead of spending money and performing repair by yourself or a third party shop.  I would still recommend getting a warranty. Please make a note that Battery will still remain out of warranty as dell only covers it for a year.  Fan Crackles :  Is it spinning at very high speeds or sounding like something is blocking it ?? If Latter is the answer,  you need a new Fan    NO both issues don't seem related, I have explained this several times on this forum, Batteries on these G Series and Alienware Machines are not great Most people in India, just look at the specs, Like I7/I5 and 4Gb graphics and buy that computer. You need to identify your needs while purchasing a computer. This is a Gaming machine means Everything CPU /GPU clock speeds, cooling system is designed for pure performance. Battery life is not a concern for this segment . In the same price I would  have recommended an XPS 13 to you. Even a new battery replacement won't give you a battery life like a normal notebook.   If you are not using the machine for Gaming, please make following changes for  increasing battery life and lower the fan speeds.  Reboot to BIOS (f2) > performance : Turn off Intel Turbo Boost  Install NVIDIA GeForce Drivers : Enable Battery boost.  Install Dell Power manager (from windows store) : Set power profile to Silent    The performance will drop by a few %, in case you are not using the machine for Gaming you won't notice any performance drops. 
I have purchased Dell G3 3579 in 2019 for INR 78k or US $1068, since then facing one or the other issue, the warranty ended at jan 2021, even then i am just writing this hoping to find a solution, the first issue i noticed is the battery, always used laptop plugged in, i did not find any issue with it, after reading FAQ article i got to know that i did mistake by charging for prolonged hours. lately there were lot of power cuts and i noticed that battery would not withstand not even for an hour and half (1 1/2 hour) I am the stupid one here, my dad reminded me of the same issue at the beginning saying "the battery is discharging very fast, you should have known this earlier before the purchase " did i listen? the answer is  "No not at all". then from the other side the GPU cooling fan started making crackling noise at first and after few days stopped working completely saying did i stutter(The office reference) i had to change a fan for an amount of INR Rs.1800 something like US $24.5, was it worth it? yes for few months but the battery issue remained unsolved . seeing that battery issue is lonely, the GPU cooling fan felt bad and started crackling up again. Just being a sherlock here, does the battery issue and GPU are anyway related ? Please help me on this! my questions are Hoping for some solutions and suggestions! [IMAGE]  
Dell G3 3579 GPU cooling fan & Battery issue