Anker 21W Solar Charger Review

Envirogadget Team | Jan 06, 2021

Our dependency on smartphones is increasing day by day. Peoples are likely to spend more and more time on their mobile screens than ever before. But what if you are away from your home and office, and your phone battery dies? It can be really a very frustrating experience especially when, if you have an important meeting or a conference, or otherwise you are traveling somewhere or having a trip. In that case, we need the energy to power our smart devices.

With technological advancement, it is now very easy to charge your smart devices anytime and anywhere. Yes, I am talking about the Solar Panel Chargers which are now becoming very popular. This eco-friendly device lets you charge your devices by means of sunlight and no electricity is needed.


In this review, I am going to discuss one of the best solar panel chargers- the Anker 21 W Dual USB Solar Charger. It is America’s leading USB charging brand that offers faster and safer charging with advanced technology. In terms of price and energy output, this one is an excellent portable solar charger to consider. With this solar charger, you can charge a basic Smartphone in about 2-3 hours from 0-100% battery capacity under direct sunlight. But in case if there is a cloudier condition, it will take somehow longer.

The Anker 21 W Dual USB Solar Charger is equipped with industrial-strength PET polymer faced solar panels stitched into a rugged polyester canvas that offers weather-resistant outdoor durability.

There come to the two charging ports enclosed in a large pocket that are pretty enough to hold most Smartphones. You can charge two devices simultaneously. Also, there is a small hook and loop that will hold the pocket shut with a phone inside. The solar panels are folded up very nicely into a compact carrying case when not in use.


Features of Anker 21 W Dual USB Solar Charger

  • Lightweight and ultra-thin design
  • Charge only with the power of direct sunlight
  • Compact size (11.1 × 6.3in folded or 26.4× 11.1in opened)
  • Stainless-steel eye-holes on each corner allowing easy attachment to backpacks, trees, or tents
  • 21 Watt SunPower solar array is 21.5-23.5% efficient, providing enough power to charge two devices simultaneously
  • It delivers the fastest possible charging speed up to 2.4 amps per port or 3 amps overall under direct sunlight
  • It is equipped with short circuit and surge protection technology that keeps you and your devices safe

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Pros & Cons



  • Excellent design
  • Performs very well when it is using sunlight to charge devices
  • Fast charging technology
  • Superior portability
  • Advanced safety



  • Sunlight is necessary to charge the devices
  • Panels are affected by interruptions in light
  • It is not compatible with the iPod nano, iPod Classic, iPod Shuffle, HP TouchPad and Asus tablets


Package Contains

  • Anker PowerPort Solar (21W 2-Port USB Solar Charger)
  • 3ft Micro USB cable
  • Welcome guide
  • 18-month warranty

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Final words

Whether you are a hiker who needs a way to keep your devices fueled during extended camping or hiking trips or even a camper who plans on being stationary, the Anker 21 W Dual USB Solar Charger is worth investing in. If you’re looking for a smart way to keep your Smartphone topped up during the middle hours of the day, and also for a reliable and trusted brand, this one is a great product. It is incredibly portable, and the price is extremely reasonable.

About Author

Envirogadget Team

Envirogadget Team

Envirogadget is a destination to find eco-friendly gadgets and technologies. Environment encloses and balances the ecosystem that further lays the foundation to prevail happy lives. So, We guide you in picking sustainable products and step towards a clean environment. 

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