Imprint &legal disclaimer.

Sandro Thabiso Schaier
Self-employed individual (živnostník) — not a registered company. Operating under a Czech trade licence (živnostenské oprávnění) issued by Úřad městské části Praha 7, in force from 6 May 2026 for an indefinite period.

Business seat:
Korunní 2569/108
101 00 Prague 10 — Vinohrady
Czech Republic

IČO: 29541263

DIČ: Not a VAT payer (neplátce DPH). VAT on your purchase is collected and remitted by Polar Software, Inc. as merchant of record.

Email: info@battery-sensei.app

Scope of activity — free trade under Annex 4 of the Czech Trade Licensing Act, specifically: provision of software, IT consulting, data processing, hosting and related activities, web portals; preparation of technical drafts, graphic and drawing work; research and development in the natural, technical and social sciences; advertising, marketing and media representation.

Supervisory trade authority — Úřad městské části Praha 10 (Prague 10 City District Office), as designated under §71(2) of the Czech Trade Licensing Act.

All purchases on battery-sensei.app are processed by Polar Software, Inc., our reseller and merchant of record. Polar handles payment, VAT collection and remittance, refunds, invoicing and chargebacks. Your purchase contract for the license is with Polar; your contract for use of the software is with the operator named above. Polar issues the tax invoice in their name — you can re-download it from the link in your purchase email or request a copy from Polar support at any time.

Polar's terms and privacy notice apply to the checkout itself and live at polar.sh/legal.

As a consumer resident in the European Union, you generally have 14 days to withdraw from a distance contract under §1829 of the Czech Civil Code (Act No. 89/2012 Coll.).

Because Battery Sensei is delivered as digital content immediately on payment, by completing checkout you expressly agree that performance begins immediately and acknowledge that, under §1837(l) of the Czech Civil Code, you lose the right of withdrawal once the licence key has been issued.

If your key has not yet been issued, or you have not yet activated it, you can still withdraw within 14 days — write to info@battery-sensei.app and we will coordinate with Polar to refund. Polar's own refund flow (available from your purchase email or the Polar dashboard) is usually the fastest path.

Request a refundPlease email from the address you used at checkout — that helps us match your purchase in seconds.

More on refunds in the FAQ →

Content on battery-sensei.app is provided in good faith and kept as current as reasonably possible. We do not warrant that every detail is accurate, complete or up to date at any given moment — software, pricing, third-party policies and legal references change.

To the extent permitted by applicable law, we exclude liability for indirect, incidental, special or consequential damages arising out of the use of (or inability to use) the site or the software. This does not limit your statutory consumer rights, which always apply in full.

This site links to third-party pages we believe are useful — competitor websites, documentation, payment-processor pages, social-security and data-protection authorities. We have no control over the content of those external pages and assume no responsibility for it. The operators of those pages are solely responsible for their own content.

All text, code, images, illustrations and brand marks on battery-sensei.app are the property of the operator unless explicitly attributed otherwise. They are protected under Czech Act No. 121/2000 Coll. (Copyright Act) and equivalent laws in other jurisdictions. Reuse, reproduction or modification beyond what applicable copyright exceptions allow requires our prior written consent.

Third-party brand marks (AlDente, BatFi, coconutBattery, iStat Menus, macOS, Apple) are referenced under nominative fair use for the purpose of comparison and are the property of their respective owners.

Use of this site is governed by the laws of the Czech Republic, with the competent courts of the Czech Republic having jurisdiction. If you are a consumer resident in the European Union, the mandatory consumer protection of your country of residence continues to apply in full and is not displaced by this clause.

We try to resolve any issue directly first — write to info@battery-sensei.app and we'll reply within a working day.

Consumers in the Czech Republic may also bring out-of-court complaints to the Czech Trade Inspection Authority (Česká obchodní inspekce, coi.cz), which is the designated alternative dispute resolution body under Czech Act No. 634/1992 Coll.

EU consumers may use the European Commission's Online Dispute Resolution platform at ec.europa.eu/consumers/odr.

How we collect, use and protect personal data is documented separately, and is the authoritative source on that subject. See the privacy notice.