The BLT001 battery is commonly associated with certain Realme devices, including the Realme Pad 10.4 (RMP2102 and RMP2103 models). While Realme sources its batteries from various manufacturers, these details are not always disclosed directly to the public.

If you're looking for a reliable replacement or genuine part, here are some tips:

1. Authorized Service Centers: Contact Realme's official service centers for genuine battery replacements.

2. Battery Manufacturers: The BLT001 battery might be manufactured by companies that specialize in OEM (Original Equipment Manufacturer) batteries, such as ATL (Amperex Technology Limited) or Sunwoda, which are common suppliers for major brands.

3. Third-party Vendors: Ensure any third-party battery you purchase is certified for safety and compatible with your device.

For safety and optimal performance, it is best to use official or certified replacement parts for your Realme Pad.