Best Portable Chargers for Samsung Galaxy S8

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Samsung Galaxy S8 comes with a battery capacity of 3000 mAh that supports 15-watt Samsung Adaptive Fast-Charging as well as 15-watt USB-C PD fast charging. The best portable chargers for Samsung Galaxy S8 support either of these fast-charging modes and can charge the S8 at same speed as the phone’s Samsung Adaptive Fast charger – zero to 50% in about 30 minutes.

Here’s our selection of the best power banks for Samsung Galaxy S8 –

Best Overall Portable Charger for Samsung Galaxy S8

RAVPower 10000 USB-C PD (18-watt USB-C PD)

USB-c portable charger for Samsung S10
RAVPower 10000 USB-C PD is slim and fast-charges Samsung Galaxy S8 to 50% in 30 mins

The recently launched RAVPower 10000 PD 18-watt slim USB-C power bank is our #1 choice as best portable charger for all Samsung Galaxy S8.

RAVPower is a reputed brand among power banks, perhaps second only to Anker, and RAVPower 10000 PD is its latest 10000 mAh capacity 18-watt USB-C PD power bank. The power bank can fast-charge the S8 as well as almost all latest Android smartphones including all Samsung flagships (S10+/S10/S9/S9+/S8/S7/Note 10/9/8) and Google Pixel 4 XL, 4, 3 XL, 3, 2 XL, and 2 from zero to 50% in 30 mins. It can also fast-charge all the latest iPhones including 11, 11 Pro, 11 Pro Max from zero to 50% in just 30 minutes. I

With just 6.7 oz (190 gm) weight and at just .50 inches (13mm/half-inch) thickness, the RAVPower 10000 PD slim portable charger is very pocket friendly and can be held in hand with the phone while charging. RAVPower 10000 PD will fully charge the Galaxy S8 fully two times with some charge still remaining. It will also charge Samsung S10/S9/S7/Note 9/8 and iPhone 11/11 Pro/XS/X/XR/8, 8 Plus minimum two times. It can fully charge iPhone 8/7/6s/6 minimum three times.

RAVPower 10000 PD can be fully charged in just 5 hours with the Samsung S8 charger via the USB-C port. It gets charged in 3.5 hours with any 18-watt or higher USB-C PD wall charger. The

The RAVPower 10000 PD has two charging ports – one USB-C PD port and a Samsung Adaptive Fast-charge capable regular USB-port. The S8 can be fast-charged using both the USB-C port or the regular USB port.

RAVPower 10000 PD Pros:

  • Charges the Galaxy S8 from zero to 50% in 30 minutes
  • Charges S8 fully two times
  • Can be charged directly with Samsung S8 USB-C charger in 5 hours
  • Supports both 18-watt USB-C PD input/output and 18-watt Quickcharge 3.0 input/output
  • Also fast-charges iPhone XR, 11, 11 Pro, XS, X/8, Samsung S10, S19+, S9+, S9, S8 & Pixel 3 XL/3/2 XL, 2
  • Can be charged even faster in 3.5 hours using a USB-C PD wall charger (such as Macbook chargers or iPhone 11 Pro/Max, or Pixel chargers)
  •  .55 inch (15 mm) thickness and 6.7 weight make it very pocketable and portable
  • Good build quality
  • Excellent price
  • Support for charging of ultra low-current devices such as wireless headphones and fitness bands

Cons:

  • No USB-C/USB-C cable included.

Anker PowerCore II Slim 10000 (#2 choice)

Anker’s PowerCore II Slim 10000 is our first preference as it is one of the most slim and compact fast-charging portable chargers for the Samsung Galaxy S8. It is easy to hold in hand and keep in pockets due to its slim and narrow design, while offering two full charges for the S8 at the fastest possible charging speed of zero to 50% in about 30 minutes.

The power bank supports 15-watt Samsung Adaptive Fast Charging for the Samsung S8. The 10000 mAh battery capacity of PowerCore II Slim 10000 fully charges the Samsung S8 two times. Besides the S8, it will also fast-charge all other latest Samsung smartphones including S10, S10 Plus, S10e, S9 Plus, S9, S8 Plus, S7, Note 9, Note 8 etc. a minimum of two times.

Slim fast charging charger for Samsung Galaxy S8
PowerCore II Slim 10000 weighs 7.2 oz (210 grams) which makes it portable

PowerCore II Slim 10000 has one micro-USB port for charging the powerbank and the portable charger can be recharged in 5 hours with the Samsung S8 phone charger or any QuickCharge 3.0 wall charger.

The power bank has a weight of 7.2 oz (210 grams) which makes one of the lightest 10000 mah power banks. It has dimensions of 5.4 x 2.6 x 0.6 inches (13 x 6.8 x 1.6 cm).

PowerCore II Slim 10000 supports fastest possible charging (15-watt Samsung Adaptive Fast Charging) for latest Samsung smartphones including S10, S10 Plus, S10e, S9, S9+ etc. as well as 2.4 amp charging for all iPhones as well. It will fast-charge all iPhones including latest XS/XR at twice the speed of the Apple iPhone charger.

Pros

  • Fast-charges the Samsung Galaxy S8 from zero to 50% in 30 minutes
  • Gives two full charges to the Samsung S8
  • Slim and lightweight – slimmest fast-charging Anker portable charger for Samsung phones
  • Gets recharged in about 5 hours by the Samsung S8 charger or any QuickCharge 3.0 charger
  • 7.2 oz weight (210 grams)
  • Fast-charges other latest Samsung smartphones
  • Fast charges iPhones at twice the speed of Apple chargers
  • Reliable and quick Anker customer service

Cons

  • No USB-A to USB-C cable included. Samsung S8 gets charged via USB-C, so either you will have to use the cable that comes with the phone (for use with the power adapter), or buy a new one Tip: You can attach the micro-USB/USB-C connector that comes with the S8, to the micro-USB cable that comes with the power bank and charge your S8 with PowerCore II Slim 10000

Best USB-C PD Portable Charger for Samsung Galaxy S8

Anker PowerCore Slim 10000 USB-C PD

PowerCore Slim 10000 PD  is the latest portable charger in Anker’s 10000 mAh range with premium build quality, compact design and all new 18-watt USB-C PD fast-charging capability. It also fast-charges the Samsung S8 at its fastest possible charging speed of zero to 50% in about 30 minutes, as the S8 supports PD charging. The power bank has a battery capacity of 10000 mAh, enough to give two full recharges to the Samsung Galaxy S8. In fact,  you can charge the S8 from 25% to 100% about three times with this portable charger.

PowerCore Slim 10000 PD   is will also charge all latest iPhones (including the 11/11 Pro/Max/XS/XR etc.) and most latest Android phones from zero to 50% in about 30 minutes. It also charger earlier iPhones (iPhone 7 Plus, 7 and earlier) from zero 50% in about 40-50 minutes, and almost all old Android phones from zero to 50% in about 50-55 minutes.

pd portable charger for iPhone XI and XRR
PowerCore Slim 10000 PD is Anker’s slimmest PD power bank and fast-charges S8

The power bank has two ports – USB-C and regular USB port, and hence, it can charge two devices at once. The power bank supports 18-watt USB-C PD from the PD port and 10-watt (or 2 amp) charging  from the regular USB port. The second regular USB port is best used for charging older iPhones and old Android phones. It charges all iPhones at 10-watt, twice the speed of Apple iPhone chargers (5 watt).

PowerCore Slim 10000 PD itself gets fully charged in about 3.5 hours with any 18-watt USB-C PD charger through the USB-C port. It gets charged with the Galaxy S8 charger in about 7-8 hours.

Weighing 7 oz, (198 grams), PowerCore Slim 10000 PD is a  light and portable power bank. It has dimensions of 5 x 3.0 x 0.6 inches (11.5 x 7.8 x 1.5 cm).

Pros

  • Gives Samsung S8 from zero to 50% in about 30 minutes
  • Fully charges Samsung S8 twice
  • Gets charged via USB-C port and hence can be directly charged with Samsung S8 Adapter
  • Premium build quality
  • Also charges all other latest Samsung phones
  • Can fast charge all latest iPhones 11/11 Pro/Max/XS/XR etc. from zero to 50% in about 30 minutes
  • Supports 18-watt USB-C PD as well as 2.0 amp charging
  • Two charging ports – USB-C and regular USB
  • Gets fully charged in 3.5 hours by any 18-watt USB-C PD charger
  • Weighs 7 oz, light and portable
  • Comes with a USB-C to USB-C cable – great for fast-charging the S8

Cons

  • None

Best High Capacity Power Bank for Samsung Galaxy S8

Anker PowerCore II 20000

PowerCore II 20000 is a high capacity fast-charging portable charger for Samsung Galaxy S8. It has a battery capacity of 20000 mAh which will fully charge the Samsung S8 four times. The power bank will give the phone zero to 50% charge in about 30 minutes – same as the S8 wall charger.

Samsung Adaptive Fast-Charging support enables this power bank to fast charge all the latest Samsung phones such as S10, S10 Plus, Note 9, Note 8, S9, S8 Plus, S7 etc. It can also fast-charge all the iPhones (X, XR, XS, XS Max, 8, 8 Plus, 7, 7 Plus, 6, 6s, etc.) at twice the speed of the Apple iPhone charger as it also supports 2.4 amp charging output.

18 watt power Bank for Samsung Galaxy S8
Anker PowerCore II 20000 will give 4.5 charges (four full charges + one half charge) to the Samsung S8

PowerCore II 20000 has a micro-USB port for charging the powerbank and comes with a micro-USB cable through which it can get charged. The power bank takes about 6 hours to get recharged with Samsung S8 charger or any QuickCharge 3.0 charger.

The portable charger weighs around 13 oz (370 grams) and has dimensions of 6.4 x 2.7 x 0.9 inches (170 x 62 x 22 mm).

Pros

  • 20000mAh battery capacity will give the Samsung S8 four full charges + one half charge (4.5 charges)
  • Gives zero to 50% charge to S8 in about 30 minutes
  • Fast-charges all the latest Samsung phones,
  • Charges other Android phones and iPhones at 2.4 amp max speed- zero to 50% in 40-60 minutes.
  • Gets recharged in 6 hours by the Samsung S8 charger or any QuickCharge 3.0 charger
  • Weighs 13 oz (370 grams)
  • Very useful 8 point battery indicator
  • Grip-friendly textured design

Cons

  • No USB-A to USB-C cable included. Samsung S8 gets charged via USB-C, so either you will have to use the cable that comes with the phone for use with the power adapter, or you will have to buy a new one

Tip: You can attach the micro-USB/USB-C connector that comes with the S8, to the micro-USB cable that comes with the power bank and charge your S8 easily. 

Best High Capacity Power Bank for Samsung Galaxy S8 and Laptops (Chromebooks, Dell XPS, Macbooks etc.)

RAVPower 20000 45-watt PD

RAVPower 20000 45-watt PD is a high-capacity future-ready portable charger for Samsung Galaxy S8 with its biggest differentiating feature being its 45-watt maximum USB-C PD output. Its 20000 mAh battery capacity will charge the Samsung Galaxy S8 about 4.5 times (4 full + one half charge) and charge the Samsung S8 from zero to 50% charge in about 30 minutes.. The power bank will also fast charge other latest Samsung phones (S8 Plus, S9, S10, S10 Plus, etc.), most latest Android phones and iPhones (11, 11 Pro/Max, X, XS, XR, 8, etc.) as it supports 18-watt USB-C PD.

The 20000 mah battery will charge will charge Chromebooks, Macbook Air and most USB-C laptops nearly once.

Any 30-watt USB-C PD charger (or a Macbook charger) can charge the RAVPower 20000 45-watt PD in about 4 hours. The Samsung S8 charger charges it in about 6-7 hours. It also has a micro-USB port for charging the power bank, meaning you can even charge the power bank with old Android chargers, if required.

PD portable charger for Samsung Galaxy S8
RAVPower 20000 45-watt PD gets recharged in about 4 hours by any 30-watt USB-C PD charger.

RAVPower 20000 45-watt PD charges Dell XPS 13 laptops and most Chromebooks with its 45-watt maximum output.  It will also charge all iPhones via 2.4 amp (or 12 watt) charging at twice the speeds of Apple stock iPhone chargers (5 watt).

The power bank weighs around 14.1 oz (398 grams) and has dimensions of 6.3 x 3.0 x 0.9 inches.

Pros

  • 45-watt PD output charges newer Dell XPS 13 series laptops, most Chromebooks, and  Macbook Air/Pro
  • 20000 mAh battery capacity will charge Samsung Galaxy S8 more than four times (4.5 charges)
  • Fast-charges latest iPhones such as iPhone 11, 11 Pro, 11 Pro Max, XR, XS, X, etc. and latest Android/Samsung phones such as Samsung S10 Plus, S10, S9, etc.
  • Charges Samsung S8 from zero to 50% in about 30 minutes
  • Gets recharged in about 4 hours by any 30-watt USB-C PD charger
  • Gets recharged in about 7 hours with S8 charger
  • Can be charged by micro-USB as well
  • Weighs around 14.1 oz (398 grams), which is acceptable given its capacity and output
  • USB-C to USB-C cable included. You need not buy extra cable for charging the S8 with the power bank

Cons

  • None

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