How we compare

BuyerSheet sites exist for products where buyers get stuck: power stations quote surge watts that won't run your fridge, robot mowers are rated for yards they can't climb, and e-bike range claims assume a light rider on flat ground in low assist.

Specs

We take specs from each manufacturer's own product pages and spec sheets, and occasionally from reputable independent spec listings when a brand's page is incomplete — we say so on the product page when that happens. Missing specs are shown as blank rather than guessed.

Prices

Where brands publish store data we read prices and stock status directly from their official stores, daily. Otherwise prices are checked by hand. Prices change often; always confirm at the retailer.

Calculators

Each site's main tool uses simple, published assumptions — for example, inverter efficiency for power stations, or a watt-hours-per-mile model for e-bike range. The assumptions are explained under "How we calculate" on each tool, and the results are estimates, not lab tests.

Rankings

Every "best" list and head-to-head verdict is computed from specs, calculator results and prices. We earn affiliate commissions from some links, but commission rates are never an input to any ranking.

Our sites

Spot a mistake? Brands revise products constantly, and we'd rather be corrected than wrong.