For $29/mo, we provide access to advanced level technicians who will answer your questions on any Macbook board related matter to the best of their knowledge promptly & walk you through how to solve your problem so you can deliver a working board to your customer.
Sorry I am a little confused as what you mean by voltage drop, when do I measure the drop?
With the 60w charger there is no voltage drop on F7005 with or without battery.