This Product
Renogy 15,000mAh
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Awards Top Pick Award Editors' Choice Award Best Buy Award  Best Buy Award 
Price $35 List$71.96 at Amazon$31.27 at Amazon$69.99 at Amazon$39.99 at Amazon
Overall Score Sort Icon
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Pros Relatively lightweight for panel type, inexpensive, charges devices efficientlyInexpensive, efficient, user-friendly, excels in partly cloudy conditionsQuick to charge, portable size, panel actually works despite small wattageEfficient, powerful, great value for its size, lightweightInexpensive, lightweight, portable, charges quickly
Cons Ineffective if relying only on solar for power, less durable than other battery packsBulky, heaviest weightHeavy, slow to replenish battery via solarPocket too small to hold extra cords and accessoriesLow output power, cannot charge multiple devices at once
Bottom Line Our top-performing panel/battery packFor an inexpensive, easy-to-use and efficient panel, the BigBlue is a no-brainerFor a small battery pack with solar capabilities, this is an impressive productThis panel is efficient in varying conditions and can charge multiple devicesThis lightweight 13W panel is able to deliver a steady charge to a single device, but lacks in its ability to charge multiple devices at once
Rating Categories Renogy 15,000mAh BigBlue 28W Goertek 25,000mAh Anker PowerPort 21W ECEEN 13W
Charging Speed (30%)
7
9
8
8
8
Charge Interruption Recovery (20%)
5
9
8
8
6
Multiple Device Charging Speed (20%)
7
9
9
9
4
Weight & Portability (20%)
9
5
7
7
9
Durability (10%)
6
7
7
7
8
Specs Renogy 15,000mAh BigBlue 28W Goertek 25,000mAh Anker PowerPort 21W ECEEN 13W
Panel Size (watts) 2W 28W 5W 21W 13W
Weight (measured) 9.5 oz 23.5 oz 19 oz 17.6 oz 12 oz
# of USB outlets 2 2 3 2 2
Max USB Output Current (amps per port) 2 amps 2 amp 1 amp 2 amp 2 amp
Battery kit? Yes No Yes No No
Size folded 6.3" x 3.1" x 0.7" 11.1" x 6.3" x 1.3" 7" x 3.75" x 1.25" 11" x 6.3" x .75" 11.4" x 6.1" x 0.6"
Battery? Yes No Yes No No
Charge tablet? No Yes No Yes Yes
Charge laptop? Npo Yes No Yes No
Panel Type Mono-crystalline PET Polymer Mono-crystalline Mono-crystalline Mono-crystalline
Size opened 6.3" x 3.1" 0.7" 33.1" x 11.1" x 0.2" 7" x 3.75" x 1.25" 26.3" x 11.1" x 0.2" 11.4" x 14.3 x .15"
Battery input (Volts / Amps) 5V 2A N/a 5V 2A N/a N/a
Charge capacity (mAh) 15,000mAh N/a 25,000mAh N/a N/a
Charge iPhone/smartphone Yes Yes Yes Yes Yes
Direct USB Plug? Yes Yes Yes Yes Yes
Daisy Chain? No No No No No
12-Volt connection No No No No No
Warranty 1 year 2 years 1 year 18 months 30 day return
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