If you want a purpose-built battery that doesn't add much weight and brings a ton of function, we'd say the $99 MagSafe Battery Pack fits the bill.
iPhone 12 MagSafe Battery Pack Tidbits: Capacity, speed, more - 9to5Mac
/cdn.vox-cdn.com/uploads/chorus_asset/file/22733323/DSC02727_dbohn_verge.jpg)
Apple MagSafe Battery Pack review: convenience over capacity - The Verge
Attaching the MagSafe Battery Pack is a snap. Its compact, intuitive design makes on-the-go charging easy. The perfectly aligned magnets keep it
Apple MagSafe Portable Battery Pack MJWY3AM/A For iPhone 14 13 & 12 Pro Pro Max
Buy Apple MagSafe Battery Pack (Wireless Power Bank 20W) for iPhone (High Copy) best price in Pakistan
MagSafe Battery Pack - Technical Specifications
Hybrid Case for MagSafe Battery Pack
MagSafe vs Power Banks: Which One Fits Your Charging Needs?
Apple MagSafe Battery Pack review: A premium battery pack for your iPhone 12
Best MagSafe wireless battery packs for your iPhone