Batfind.
How the math works. No surprises.

Ranked by math. Not by us.

The ranking

We rank by €/Wh — price in euros divided by usable capacity in watt-hours. For each model, we use the cheapest in-stock offer across the marketplaces we cover. Cheapest wins. Math has no preferences.

Why €/Wh and not €/mAh

mAh comparisons only make sense within a single voltage class. A 10 Ah 12 V battery and a 10 Ah 24 V battery store very different amounts of energy. Wh is voltage-normalised energy. It lets us compare across formats fairly.

Marketplaces we cover

Amazon.de, eBay.de, and AliExpress in V0. More as we grow.

Data freshness

Prices are checked manually on a weekly cadence. Every offer carries the date we last verified it. Markets move; the site updates as we refresh the catalog.

What we don't do

  • Paid placements
  • "Editor's picks" disguised as rankings
  • Including out-of-stock offers in the best-price calculation

Browse the current power station rankings.

FAQ

Common questions about how this site works.

What does €/Wh mean and why does it matter?

Price in euros divided by capacity in watt-hours. It is the price of one watt-hour of stored energy. Lower is cheaper. It is the only metric that compares power stations fairly across formats — a 12V 10Ah battery and a 24V 10Ah battery have the same mAh number but store completely different amounts of energy. Watt-hours normalize across voltages.

Why not compare by mAh?

mAh only makes sense within a single voltage class. A 10 Ah 12 V power station stores 120 Wh; a 10 Ah 24 V power station stores 240 Wh. Same mAh, half the energy. The marketing benefits from this confusion; the buyer does not. We use Wh because it tells the truth.

How do you handle out-of-stock items?

They are excluded from the best-price calculation entirely. If a unit is out of stock on every marketplace we cover, we mark it as "off the shelf" and it drops to the bottom of the ranking. Showing prices buyers cannot actually take advantage of would be dishonest.

Which marketplaces do you cover?

Amazon.de, eBay.de, and AliExpress (where credible listings exist) as of V0. We add marketplaces as they prove worth the operational cost. AliExpress for portable power stations is currently dominated by no-name reshippers, so most of our SKUs do not yet have AliExpress offers.

How often is the data updated?

A daily cron checks every URL in our catalog and either auto-updates the price or files a manual-refresh ticket when a marketplace blocks the request. Operator review happens at least weekly. Every offer carries a "last checked" date. Markets move; prices may have changed since.

Do you make money on the links?

Yes. Batfind earns commissions on outbound purchases through our affiliate links (Amazon Associates, eBay Partner Network, AliExpress affiliate). Commissions do not influence ranking. Rankings are computed mechanically: price divided by watt-hours, sorted ascending. We do not accept paid placements.

How do you decide which power stations to add?

Manual curation. A daily LLM-driven scout suggests new candidates from credible brands (Jackery, EcoFlow, Bluetti, Anker SOLIX, Goal Zero, Allpowers, Zendure, Fossibot); a human reviews and adds the ones worth covering. No-name AliExpress brands are excluded.