A great portable speaker balances sound quality, battery life, durability, and size. The best choice for a beach day is different from what you need for a backyard barbecue or a camping trip.
Size categories
Ultra-portable (pocket-size): Fits in a cup holder. Great for bike rides and small gatherings. Battery life typically 8-12 hours. Sound is clear but lacks deep bass.
Mid-size (water-bottle size): The most versatile category. Good bass, loud enough for a small party, and still easy to carry. Battery life 12-20 hours. Look for IP67 water and dust resistance.
Party-size (lunchbox size): Deep bass, room-filling volume, often with light shows or karaoke features. Battery life around 8-16 hours. Heavy but has a handle or strap for carrying.
Features that matter
Water resistance (IP67 is the gold standard), USB-C charging, speakerphone capability for calls, stereo pairing if you want wider soundstage, and a strap or loop for hanging.