August 1, 2018

The fastest way to charge the Samsung Galaxy S9 and S9+

By Team Ventev Topic: Tech Specs

When Samsung introduced the Galaxy Note 5 in 2015, it stood out for being the first phone to use the company’s proprietary Fast Wireless Charging.

It was new. It was fresh. And compared to other wireless charging methods, it was fast.

It still is. Fast Wireless Charging makes an appearance on the new Galaxy S9 and S9+, with wireless charging times roughly the same as those of the S8 and S8+, which makes them among the fastest around.

The S9 and S9+ are also compatible with Qualcomm® Quick Charge 2.0 and Samsung’s Adaptive Fast Charging; both wired systems that fall into the category of “tried and true,” but which nonetheless are relatively fast.

As we do with every flagship smartphone, we tested the charging speeds of the S9 and S9+, along with their compatibility with our chargers, and a variety of cases available in the marketplace.

How Samsung’s new phones stack up

The Samsung Galaxy S9 and S9+ feature a 3,000 mAh and 3,500 mAh battery, respectively. We tested both with various Ventev chargers, starting at 5 percent battery life and measured how long it took the battery to reach various intervals.

The charts below show the charging times associated with each phone and charger. Each bar represents a different charger, and each band of color represents about 25 percent of the battery’s capacity. A shorter bar indicates faster overall charging, while a shorter band of color indicates that the phone sped through one of the charging intervals.

When looking at these graphs, pay attention to the charging times between 5 percent and 30 percent, and the times between 5 percent and 50 percent as these intervals give a better sense of a charger’s power when working with the device.  

As you can see, both the wireless chargestand and the wireless charging car kit charged at about the same rate.

The wireless charging speeds in the chart above are relatively fastTo compare: the iPhone 8 took three hours to charge wirelessly, and the iPhone 8 Plus fully charged in three hours, 30 minutes. Both phones, it should be pointed out, have smaller batteries than the Samsung Galaxy S9 and S9+. The iPhone 8 has a 1,821 mAh battery while the 8 Plus’s battery clocks in at about 2,700 mAh. Additionally, the Samsung Galaxy S9 and S9+ wirelessly charge at 10 watts, a 2.5 watt faster wireless charging rate than the iPhone 8 and 8 Plus, which currently tops out at 7.5 watts.

When it comes to plugging in, Ventev’s Qualcomm® Quick Charge™ compatible chargers, like the wallport rq1300, matched – within a minute or two – the charging speed of the in-box charger, charging from 5 percent to 30 percent in 19 minutes with the Galaxy S9, and 18 minutes with the S9+.

The best accessories for the Galaxy S9 and S9+

If you’re looking for an additional wall charger, a car charger, or a replacement charger for the Samsung Galaxy S9 or S9+, look for one that’s Qualcomm® Quick Charge 2.0 or 3.0 compatible, like the wallport rq1300 or the dashport rq1300  for the car. If you’re buying a cable as well as a charger, note that the S9 and S9+ use the newest USB Type-C™ connectors. 

When charged with our wireless chargestand and wireless charging car kit, both the S9 and S9+ displayed fast charging on their screens. As cases can sometimes interfere with wireless charging, we also tested a number of popular cases to confirm compatibility with Ventev’s wireless products. While this testing was not exhaustive (have you seen the Amazon search results for phone cases?), here are 14 cases tested for compatibility.

  • Galaxy S9 cases
    • OtterBox – Defender, Symmetry
    • UAG – Monarch, Plasma
    • Casemate – Iridescent
    • Gear4 – Piccadilly
  • Galaxy S9+ cases
    • OtterBox – Defender, Commuter
    • UAG – Pathfinder, Plyo
    • Casemate – Toughstand, Sheer Crystal
    • Gear4 – Piccadilly, Battersea

When it comes to charging the S9 and S9+, Samsung took a tried-and-true approach. There aren’t any surprises here, but that’s OK. There’s a lot to love about these phones, like a great camera with dual 12-megapixel cameras and a Super AMOLED display. But just remember: you can’t use your phone unless it’s charged.

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