Power bank safety
A power bank is a lithium battery you carry against your body. Here are the EU rules it must meet, the documents we will publish for the ONDO 20K, and the habits that keep it safe.
What a magnetic power bank must comply with in the EU
| Rule or standard | What it covers |
|---|---|
| EU Battery Regulation (EU) 2023/1542 | Fully applicable from 18 August 2025. Sets labelling and information duties for portable batteries: model and batch, manufacturer name and address, capacity, the separate-collection symbol, and later a QR code. |
| EN 62133-2 | Safety tests for the rechargeable lithium cells. |
| EN IEC 62368-1 | Safety of the device as a piece of electronic equipment. |
| UN 38.3 | Transport tests every lithium battery must pass before it can be shipped or flown. |
| EMC and RoHS | Electromagnetic compatibility, and limits on hazardous substances. |
| WEEE | The crossed-out bin on the product, and registration for electrical-waste collection in each country where it is sold. |
| CE marking | The manufacturer’s declaration of conformity, which names the exact model and the rules it meets. |
Sources: the text of Regulation (EU) 2023/1542 on EUR-Lex, and the summaries by TÜV and SGS, read 29 October 2026. This is a summary, not legal advice.
What we publish, and when
For the ONDO 20K we will publish the declaration of conformity, the EN 62133-2 and EN IEC 62368-1 test reports, the UN 38.3 test summary and a photo of the battery label on this page. Each one appears here when we have received it from the manufacturer and checked that it names this model. Until a document is listed below, we make no claim based on it.
| Document | Status |
|---|---|
| Declaration of conformity | Not published yet |
| EN 62133-2 test report | Not published yet |
| EN IEC 62368-1 test report | Not published yet |
| UN 38.3 test summary | Not published yet |
| Battery label photo | Not published yet |
Safe use
- Charge it while you are awake and at home, not overnight and not while you are out.
- Never charge it under a pillow, in bed or under a cover; heat needs somewhere to go.
- Keep it away from radiators, direct sun, a hot car and cookers.
- Stop using it, and do not charge it, if it is swollen, leaking, cracked or very hot to the touch.
- Use a charger and cable in good condition; replace any that are damaged.
- Do not charge it in a hallway or anywhere that is your way out of the building.
- Never put it in household waste.
This follows the published advice of Scottish Fire and Rescue Service and West Yorkshire Fire and Rescue Service, read 30 October 2026. The guide to charging the bank covers everyday care.
Flying with a power bank
At 20,000 mAh and a nominal 3.7 V, the ONDO 20K holds about 74 Wh, under the 100 Wh limit for a spare battery without airline approval. It goes in hand luggage only, never in a checked bag, and some airlines do not let you use or charge a power bank during the flight. The power banks on planes guide has the rules and the sources.