final --> for primitives --> value can't change. for non-primitives --> you can't change the reference and point it to another object. Note : It is different from immutability.
Hands down, the Bluetooth speaker with the longest battery life is the Fugoo. It offers up to 40 hours of battery life, nearly twice the battery life of other leading Bluetooth speakers in this category. Given how long its battery lasts, you might even forget that the Fugoo needs to be plugged in to charge.
You can also wirelessly link multiple Flip 3 speakers using the free JBL Connect app. The Bad Some distortion at higher volumes with certain tracks. The Bottom Line Enhanced with better battery life and splashproof design, the Flip 3 is one of the best mini portable Bluetooth speakers available.