BioLite SolarPanel 10+ vs Casio Pro Trek PRG-340

Weight and specs compared for 2026 — and which one to choose.

Casio Pro Trek PRG-340 is the lighter option — 434 g lighter than the BioLite SolarPanel 10+ (87% less weight). If grams matter to you, that is the one to beat.

Spec	BioLite SolarPanel 10+	Casio Pro Trek PRG-340
Weight	500 g · 0.500 kg · 1.10 lb	66 g · 0.066 kg · 0.15 lb
Brand	BioLite	Casio
Category	Electronics	Electronics

BioLite SolarPanel 10+

500 g

10W solar panel with integrated 3000mAh battery.

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Casio Pro Trek PRG-340

66 g

Solar-powered outdoor watch with triple sensor.

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BioLite SolarPanel 10+ vs Casio Pro Trek PRG-340: which should you buy?

If saving weight is your priority, the Casio Pro Trek PRG-340 wins — at 66 g it is 434 g (87%) lighter than the BioLite SolarPanel 10+ (500 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.

See where both rank against everything else in this category on the lightest electronics page, or browse the full gear weight database.

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