The JBL Flip 3 has new build materials that make it splash proof and has a longer battery life. In other words, it's better than the Flip 2 in every way.
JBL GO 3 Review
JBL Charge 3 review: A good buy, even now - SoundGuys
JBL Flip 5 review - SoundGuys
JBL Flip 6 review: A great all 'rounder - SoundGuys
JBL Flip 3 vs. JBL Charge 3—Which should you buy? - SoundGuys
JBL Flip 6 review: A great all 'rounder - SoundGuys
JBL Flip 5 review - SoundGuys
Best Buy: JBL Flip 3 Portable Bluetooth Speaker Black JBLFLIP3BLK
JBL Flip 3 vs UE Boom 2 - SoundGuys
Troubleshooting JBL Flip 3 Problems - HubPages
JBL Boombox 3 review - SoundGuys
JBL Flip 3 review: Is it still worth the money? - SoundGuys