Can add a power module for P3541 A02?

For example battery?
你好,请问一下,这边是否支持在底座的边沿版新增一个纽扣电池,用来保存系统的时间?
如果可以的话,这边电源纽扣商品的链接地址有么??

Please refer to below RTC info in Nano module datasheet in DLC.

The following backup cells may be attached to the PMIC_BBAT pin:
 Super Capacitor (gold cap, double layer electrolytic)
 Standard capacitors (tantalum)
 Rechargeable Lithium Manganese cells
The backup cells MUST provide a voltage in the range 2.5V to 3.5V. These is charged with a constant current (CC), constant
voltage (CV) charger that can be configured between 2.5V and 3.5V CV output and 50μA to 800μA CC.