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The Dark Energy Poseidon Pro is a rugged 10,200mAh power bank in a polycarbonate shell rated IP68 waterproof and built to survive drops, dust and temperatures from -15°F to 100°F. It has one USB-A and two USB-C ports with fast charging, a timer mode and a low-power mode for small devices, and Dark Energy claims it holds a charge for over 8 years and cycles more than 500 times. At 9.6 oz and about the size of a phone, it is heavier and bulkier than slim everyday power banks but far tougher than typical plastic packs. Owners like the rugged build and port selection; the 3.4 rating across 700 reviews suggests a fair number of buyers hit reliability or capacity complaints.
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Lowest price we've seen: $79.51 on Nov 13 at Walmart. Tracked across 10 stores since Nov 13.
Owners praise the Poseidon Pro's tank-like build and waterproofing, and many use it as a camping and emergency pack. A notable share of the 700 ratings are negative, with buyers reporting units that died early or delivered less charge than expected.
The Poseidon Pro is a portable charger built to be rugged and waterproof.
A 3-foot USB-C cable is included.
