Just Useful Prices

Each page ranks one kind of product by the number that matters most when you buy it: price per watt-hour, per kilogram, per BTU, and so on. Each price shows the date it was checked.

• Creatine — 20 listings, from $0.150 per 5 g
• Inverter generators — 67 listings, from $0.107 per W
• Portable power stations — 58 listings, from $0.317 per Wh
• Protein powder — 14 listings, from $3.87 per 100 g protein