Best Portable Chargers for Samsung Galaxy S8

Launched in 2017 as a flagship phone, the Samsung Galaxy S8 came with a battery capacity of 3000 mAh that supported 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

Anker PowerCore II Slim 10000

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 Powercore II 20000 and charge your S8 with PowerCore II Slim 10000

Best Overall Power Bank for Samsung Galaxy S8 (Runner Up)

RAVPower 10000 mAh QC 3.0

RAVPower 10000mAh QC 3.0 is our next pick. It is one of the most compact 10000 mAh battery capacity portable chargers and comes with Quickcharge 3.0. Though the S8 may not support Quickcharge 3.0, the RAVPower 10000mAh QC 3.0  also supports the 15-watt Samsung Adaptive Fast Charging mode for the S8 and gives the Samsung Galaxy S8 zero to 50% charge in about 30 minutes..

The 10000 mah  true battery capacity RAVPower 10000mAh QC 3.0 fully charges the Samsung S8 two times. It will also fast-charge other latest Samsung phones including S10, S10 Plus, S9, S9 Plus, S8 Plus, etc. and all the other Android phones that support QuickCharge 3.0 such as LG G8, G7, G6, Mi 9/8 etc. a minimum of two times. The power bank will also fast-charge all iPhones from zero to 50% in 40-55 minutes as it supports 2.4 amp charging.

Portable phone charger for Samsung Galaxy S8
RAVPower 10000mAh QC 3.0 will fast-charge all the Samsung smartphones and other Android phones that support QuickCharge 3.0.

RAVPower 10000mAh QC 3.0 has one micro-USB port through which it can be charged. It gets recharged quickly in about 5 hours with the Samsung S8 charger or in 4 hours with any QuickCharge 3.0 charger.

The power bank weighs 6.8 oz (198 grams) and has dimensions of 5.8 x 2.8 x 0.6 inches.

Pros

  • Fast-charges Samsung Galaxy S8 from zero to 50% in about 30 minutes
  • Gives two full charges to the Samsung S8
  • Rounded corners and narrow, slim design make it pocketable
  • Reasonably priced
  • Gets recharged through the micro-USB port in about 3.5 hours by any Samsung charger or QuickCharge 3.0 charger
  • Weighs 6.8 oz (200 grams)
  • Fast-charges other latest Samsung phones and Android phones that support QuickCharge 3.0
  • Supports 2.4 amp fast charging for iPhones

Cons

  • 6-point or 8-point battery status indicator would have been more convenient

Best Future-Ready Portable Charger for Samsung Galaxy S8

Anker PowerCore 10000 PD

PowerCore 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 10000 PD is Anker’s most future-ready power bank as it will also charge all latest iPhones (including the XS/XR) 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.

Adaptive fast charging power bank for Samsung Galaxy S8
PowerCore 10000 PD supports both 18-watt USB-C PD as well as 2 amp charging

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 iPhones and old Android phones. It charges iPhones at 10-watt, twice the spped of Apple iPhone chargers (5 watt).

PowerCore 10000 PD itself gets fully charged in about 3.5 hours with any 18-watt USB-C PD charger through the USB-C port.

Weighing 7 oz, (198 grams), PowerCore 10000 PD is a  light and portable power bank. It has dimensions of 4.5 x 2.0 x 1.0 inches (11.5 x 5.0 x 2.5 cm).

Pros

  • Gives Samsung S8 from zero to 50% in about 30 minutes
  • Fully charges Samsung S8 twice
  • Premium build quality
  • Also charges all other latest Samsung phones
  • Can fast charge all latest iPhones from zero to 50% in about 30 minutes
  • Supports 18-watt USB-C PD as well as 2.0 amp charging
  • Charges two devices at once
  • 28-watt maximum output means both charging ports can be used at their max speeds at once
  • 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 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 Powercore II 20000 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 (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 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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