Dry cell battery rechargeable phone case

Just like with electric cars, the biggest concern when using a mobile phone is battery life. Especially for mobile gamers like myself, the phone battery often becomes critically low after just a few games. The main drawback of using a power bank is its bulky size and inconvenience, and charging while playing can negatively impact performance. Therefore, I designed a Huawei P30 dry-cell battery phone case.
The main chip is the PW5100, a high-efficiency synchronous boost converter specifically designed for powering 5V devices from dry-cell batteries.
The circuit is very simple, with only two capacitors and one inductor. It's completely based on the official design. The
 
case design is particularly noteworthy; it fits the Huawei P30 snugly, consisting of a main body and a battery back cover.
 
 
The PCB uses JLCPCB's color PCB process, resulting in a very attractive appearance. The front of the PCB shows very few required components.
 
The back actually contains a QR code. Here are some photos of the front after installation and the back after installation . Important
 
notes : 1. The PW5100 generates a lot of heat. Initially, I connected two dry-cell batteries in parallel, but testing showed that it only lasted 10 seconds before shutting down. Later, a two-cell series connection was necessary, resulting in an output of around 100mA, which effectively protects the phone's battery. 2. Use a Type-C interface for output, paying attention to the positive and negative terminals. 3. For detailed information on the PW5100, contact the manufacturer for support; in other words, it's best to consult before starting. A video of the process can be found on Bilibili : https://www.bilibili.com/video/BV1PD421V7SP/