The tracker battery is not replaceable.
The star rail gift set was packaged incredibly well. As a collector, the box arrived in perfect condition. The power bank, charger, and retractable cable were well designed. The collectibles were great too. The only thing I am disappointed about is that the battery on the square tracker is not replaceable. For what should be a limited collaboration item, you would think that it would have a replaceable battery, but it doesn’t. So after the advertised 5-7 years, you would need to buy another tracker or just let it become a paperweight. Not really environmental or economically friendly.