It looks like you're looking for a suitable charging pool or charging accessory for the OPPO Realme GT Neo 5SE (RMX3700/RMX3701). The term "charging pool" typically refers to a charging station or dock, but if you're specifically referring to a battery or charging solution, it may be best to look for compatible chargers, power banks, or charging docks.

For the Realme GT Neo 5SE, you'll need to ensure compatibility with:

1. Charging Port: The Realme GT Neo 5SE uses USB Type-C, so ensure that the charging dock or station supports Type-C charging.

2. Wattage: The phone supports fast charging (up to 100W), so if you're looking for a charging solution, make sure it supports that level of power delivery (PD) to optimize charging speed.

3. Charging Standards: Ensure that the charging station or accessory supports the proper charging standard like Qualcomm Quick Charge or USB-PD (Power Delivery) for faster charging.

If "P991" refers to a specific model number or product type, please clarify, and I can help you find the right accessories!