7.8/10
Top Score
EcoFlow DELTA Pro 3
Biggest battery in its class — 4,096 Wh on tap.
Independent Gear Lab
We scored every spec, so you can skip the guesswork.
One published formula, applied to every model's official spec sheet. No hands-on claims, no sponsored rankings — just the math.
4,096 WhCapacity
4,000 WAC Output
2,600 WSolar Input
EcoFlow DELTA Pro 3
Top Score · 7.8/10
171
Products Scored
855
Spec Data Points
0
Sponsors
The Index
19 categories, one formula
Every category uses the same method: min-max normalize each official spec, apply published weights, multiply by ten.
Portable Power Stations
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Portable Solar Panels
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Camping Fridges
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Inverter Generators
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Portable Projectors
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Smart Kitchen Gadgets
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Countertop Ice Makers
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Home Air Purifiers
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Robot Vacuums
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Hair Styling Tech
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Desktop 3D Printers
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Espresso Machines
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Smart Bird Feeders
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Gaming Headsets
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Gaming Mice
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Mechanical Keyboards
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Noise-Canceling Headphones
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Gaming Handhelds
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Bluetooth Speakers
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Wireless Microphones
Open the comparison →Answer First
The top score in every category
The highest-weighted spec sheet in each category — the same score you'd get if you ran the formula yourself.
9.0/10
Top Score
Jackery SolarSaga 200W Bifacial Portable Solar Panel
Tied for the best rated output in the category — 200 W.
7.1/10
Top Score
Setpower DT45 Electric Cooler Car Refrigerator With Cover,45L Dual Zone Portable Freezer Fridge
Best dual-zone capability in the category — dual zone.
7.7/10
Top Score
Westinghouse iGen4500DFc 4500 Peak Watt Dual Fuel Portable Inverter Generator with Remote Start & CO Sensor
Best rated output in the category — 3,700 W.
7.4/10
Top Score
Nebula Mars 3 1080p Outdoor Portable Projector
Best battery runtime in the category — 5 h.
7.1/10
Top Score
Cuisinart CCO-50BKN Deluxe Electric Can Opener (Black)
Best estimated monthly sales in the category — ~10,000 units/mo.
6.8/10
Top Score
Silonn Nugget Ice Maker Countertop, Chewable Pellet Ice, 36lbs/24H (Black)
Best review volume in the category — 24,895 reviews.
8.2/10
Top Score
Levoit Core 300 Air Purifier for Allergies & Pet Hair, Covers Up to 1095 ft²
Best review volume in the category — 108,241 reviews.
5.5/10
Top Score
roborock Q7 M5+ Robot Vacuum and Mop, Up to 7-9 Weeks Self-Empty, 10000Pa | Upgraded from Q5 Max+, Dual Anti-Tangle System for Pet Hair & Carpet, PreciSense LiDAR Navigation, App Control, Black
Best estimated monthly sales in the category — ~7,000 units/mo.
5.6/10
Top Score
REVLON One-Step Volumizer Original Hair Dryer and Styler
Best buyer rating in the category — 4.6 / 5.
7.1/10
Top Score
FLASHFORGE Adventurer 5M 3D Printer CoreXY 600mm/s
Best review volume in the category — 2,102 reviews.
9.3/10
Top Score
Breville Barista Express Espresso Machine BES870XL, Brushed Stainless Steel
Best review volume in the category — 27,023 reviews.
6.4/10
Top Score
Kiwibit Solar Smart Bird Feeder 4K with Camera
Best buyer rating in the category — 4.5 / 5.
9.1/10
Top Score
Razer BlackShark V2 X Gaming Headset: 7.1 Surround Sound - 50mm Drivers - Memory Foam Cushion - for PC, PS5, PS4, Switch, Xbox - Black
Best high-frequency reach in the category — 28 kHz.
8.3/10
Top Score
Razer DeathAdder V3 Wired Gaming Mouse: 59g Ultra Lightweight - Focus Pro 30K Optical Sensor - 8K Hz HyperPolling - 6 Programmable Buttons - Optical Switches Gen-3 - Black
Tied for the best polling rate in the category — 8,000 Hz.
7.8/10
Top Score
Keychron K8 Pro QMK/VIA Wireless Mechanical Keyboard, Hot-Swappable Aluminum Frame TKL Custom Programmable Keyboard with RGB Backlit, Gateron G Pro Red Switch
Best battery life in the category — 260 h.
8.8/10
Top Score
Sennheiser Momentum 5 Wireless Headphones, ANC, 56 Hr Battery, Black
Tied for the best Bluetooth version in the category — Bluetooth 5.4.
7.8/10
Top Score
MSI Claw 8 AI+ A2VM PC Gaming Handheld: Intel Core Ultra 7 258V, 8-inch FHD+ 120Hz, 32GB, 1TB SSD, Windows 11
Tied for the best battery capacity in the category — 80 Wh.
6.8/10
Top Score
Soundcore Boom 2 by Anker, 80W Outdoor Bluetooth Speaker, 24H Playtime, IPX7, Black
Best rated output in the category — 80 W.
9.6/10
Top Score
DJI Mic Mini (2 TX + 1 RX + Charging Case), Ultralight Wireless Microphone
Best transmitter battery in the category — 11.5 h.
Why Trust the Numbers
No lab coat. No finger on the scale.
01 / The Formula
One Open Formula
Each metric is min-max normalized across the models we track, then scored as ten times the weighted sum.
score = 10 × (0.25·capacity + 0.25·AC output + 0.20·cycle life + 0.15·portability + 0.15·solar input)
02 / Data Sources
Official Sources Only
Every spec comes from the manufacturer's official product page — never from retailer listings, reviews, or forums. Each product page links the exact source its numbers came from.
03 / Update Cadence
Re-Verified Monthly
Specs are re-verified against the official pages on a monthly cycle, and scores are recomputed the day any data point changes or a model enters or leaves the list.
04 / What We Don't Do
No Sponsors, Ever
We don't lab-test. We don't show prices. And we don't sell placement — no brand can pay to move a score, because the formula only reads specs.