Samsung Galaxy S6 and S6 edge screen and battery replacements will be expensive
$45 is higher than the price asked for a Galaxy S5 battery replacement ($29.99), but lower than what you'd have to pay for a new Apple iPhone 6 battery ($79).
Way more expensive than replacing a Galaxy S6 battery will be replacing its screen. Reportedly, Samsung will charge $199 for putting a brand new screen inside your S6 (once again, this is only after the 1-year period of free warranty). It seems that replacing the display of the S6 edge will also cost $199, despite the fact that we're talking about a dual-curve display here.
PC Mag says that Samsung can replace a Galaxy S6 and S6 edge screen or battery quite fast, shipping the handsets back to their owners in one business day in the US (things may be different in other markets).
source: PC Mag via Sam Mobile