what kind of USB is this? 2.0 A?

Maximum output power is 1.0A. And output connector is a USB A type female connector. So you can use anything of USB devices.

What is the temperature gradient needed for peak output? Can I put something super cold on the water side instead of applying heat to the bottom side?

If the bottom plate(cold) is 100 degree Celsius and the top plate(hot) is 250 degree Celsius, so like this dT 150 C is output power 3 Watt and case of dT 250 C is output power 5W.

Hi, what kind of cables can you connect to this and Can you charge tablets?

Hi, The cable is a micro 5 pin USB which is a normal Android smart phone cable and tablet PC also possible.

Is pond water okay? What about clear water from a running river? Rain water? Or does it need filtered drinking water, which then needs thrown out?

Yes, pond, river and rain water are OK because just it is used for heat sink. Don't drink the water in silicone bowl.

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Description

⚡ Stay charged off-grid—because your adventure deserves power that keeps up!

BUILT TO LAST - No repairs, no maintenance—engineered for long-lasting, hassle-free use on every adventure.
POWER UP ANYWHERE - Reliable 5W USB output charges your devices as fast as home power—no outlets needed.
THERMOELECTRIC MAGIC - Harnesses heat difference to generate clean energy—fuel-free and eco-friendly.
FEATHERWEIGHT CHAMPION - At just 350g and pocket-sized (10 x 4 cm), it’s the ultimate backpacker’s power companion.
HEAT RESISTANT DURABILITY - Silicone rubber casing ensures safety and resilience even in extreme camping conditions.

The Ajirangi miniO is a compact, 5W thermoelectric generator designed for campers and backpackers. Weighing only 350g and measuring 10 x 4 cm, it converts heat differences into USB power, enabling fast smartphone charging without fuel or maintenance. Its heat-resistant silicone rubber build ensures durability, making it a reliable, eco-friendly power source for outdoor enthusiasts.

Specifications

Brand	Ajirangi
Wattage	5 watts
Fuel Type	No Fuel" or "Thermoelectric
Power Source	Thermoelectric
Recommended Uses For Product	Camping, Residential
Item Weight	350 Grams
Voltage	5 Volts
Output Wattage	5 Watts
Special Feature	Portable
Included Components	Generator unit only
Color	Sky Blue
Product Dimensions	1.57"W
Material	rubber
Model Name	miniO
Engine Type	4 Stroke
Ignition System Type	Magneto
Frequency	60 Hz
Engine Power Maximum	5 Watts
Running Wattage	5 Watts
Manufacturer	Ajirangi
Item Package Dimensions L x W x H	5.12 x 5.04 x 3.7 inches
Package Weight	0.51 Kilograms
Item Dimensions LxWxH	3.94 x 3.94 x 1.57 inches
Brand Name	Ajirangi
Country of Origin	Republic of Korea
Number of Items	10
Part Number	miniO-5W

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