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Bill Gates may have been focusing on charity in the past decade or so, but he still buys a pricy gadget every now and then. 

Case in point: his latest purchase, according to The Telegraph is Sinot Aqua, a hydrogen-powered superyacht with an estimated price tag of $644 million. 

The 112-meter long yacht has five decks which host 14 guests and a 31-person crew. It comes with a number of ultra-fancy amenities, including an infinity pool, a deck lounge that turns into a home (boat?) cinema, a spa, gym, beauty salon, helipad, and a private observatory deck at the yacht’s bow with a near-unlimited view of the ocean. 

The yacht’s two 1MW motors, fueled by two massive hydrogen tanks, give it a 17-knot top speed and a 3,750-mile range.

Despite all the luxury, the fact that the Aqua is the first fully hydrogen-powered vessel of its kind gives the yacht an environmentally-friendly note, though I somehow doubt we’ll see people buying such vessels en masse, however sustainable it may be. 

Looks pretty cozy.
Looks pretty cozy.

According to The Guardian, Gates often takes holidays on superyachts, though he typically rents them — this is the first time he’s bought his own. 

Of course, there's a helipad on board.
Of course, there’s a helipad on board.

The yacht, which was announced at last year’s Monaco Yacht Show, will likely go to sea in 2024.