150 WATT LAPTOP BATTERY CHARGER.

i had already hired one freelancer in pakistan, but he never worked for this job. he copied and pasted any image on google , required the money from [login to view URL] i wasted my money and time. pls remember i only need Altium Schematic file and explanation for sch. my budget is max $50 if you can do with this price please bid circuits are designed for 19v output of charger. we need to get 19v DC output. input AC voltage into adapter needs to work with 120v AC but preferably be able to run off of 100AC-230AC so we are going to need battery pack designed. I wanted 3-4 cells in series(none in parallel) equalling a total of around or close to 10,000mAH. normal lithium polymer flat cells 3.7 nominal-4.2 peak. battery pack design will need to have the internal pcb protection circuitry and we would need to finish any remaining clock/data lines and find a battery connector for on the motherboard side as well. so its fairly complicated. How familiar are you with this? or do you think you could design it? so that it works well with the max1908? and of course, please take your time. a lot of battery packs today seem to be poorly built, so id like to get a battery pack as high quality as possible designed. a lot of problems i see with them are ones that are in parallel confiruation usually are awful due to no proper cell balancing, so i want to stay away from parallel. another problem i sometimes see is that the battery pack cant provide enough output power to drive entire system load when under heavy load. We want to make sure it is capable of driving up to 150 watts or so of peak load, so as to avoid hard shut downs.