Frequently asked questions
Everything that matters before and after ordering. Missing an answer? Write to support@kyuzet.com.
Does QZ drain the battery?
In Storage mode it draws about 5.3 mA — roughly 1.5 % of a 60 Ah battery's capacity per week. It is designed for cars that sit for months.
Does it work in an underground garage?
QZ communicates over the mobile network. If even a weak signal reaches the garage, it works. If there is no signal at all, it sends the data once the connection is restored.
Will I lose my car's warranty?
Connecting to the battery terminals normally involves no intervention in the vehicle's electronics — QZ uses neither OBD nor the CAN bus. Warranty terms can nevertheless vary by manufacturer and specific vehicle.
Do I need an app?
The app runs in the browser. On first launch we guide you through enabling alerts — on iPhone you add the app to your home screen (we show you how), on Android you just allow notifications. After that, alerts arrive on their own, without opening the app.
What happens after the first year?
The service continues at 49 €/year (less with multiple vehicles). We notify you before renewal and you can cancel at any time.
Which batteries and vehicles?
12V lead-acid batteries of all types (standard, EFB, AGM, GEL) as well as LiFePO4 — in cars, motorbikes, campers and EVs.
I'm not technical. Can I manage it?
You connect 2 cables to the battery — plus and minus. About 10 minutes. If you'd rather not, any workshop can help, or write to us.
What if it's not for me?
Online purchases come with a 14-day no-questions return window. You may reasonably try the device to verify it works. If it shows visible wear or installation damage, the refund can be proportionately reduced.
Does it rely on Wi-Fi or a home network?
No. The mobile network (4G LTE) is included in the device price — no separate monthly connectivity fee. After the first year, active alerts require a service renewal (49 €/year).
Does QZ replace a workshop battery test?
No. QZ tracks how the battery behaves in real life and warns about risk. A workshop can precisely measure CCA (load test), parasitic drain and current capacity — QZ doesn't do that. If QZ shows repeated weakening, we recommend a workshop check.
I'm VAT-registered — how do I enter my VAT ID?
At checkout click "Add Tax ID", pick your country and enter the number without the country prefix. EU B2B reverse charge is verified via VIES and applied automatically — no Slovak VAT.
Not sure?