I play music for maybe a total of 4-6 hours a day if i’m at work.
I have the sport NB10 which takes up 1 hr 30 mins to charge from dead to full. However it can get enough charge in 30 mins for my workday when I play less music and use them for calls instead. I keep them on almost all day when at work, when playing music for hours, I get up to about 5 hours on close to max volume. If I play couple songs ever now and then, I can manage to get it to last through the day.
Also have the Soundbuds lite It seems to be much louder than the sport NB10, also sounds better in my opinion but the bass is weaker though. The battery on the Soundbud lite does last much longer. The lite does last through my workday without having to worry about charging. Seeing that I can use it for two days without charging It is probably getting that 12 hour playback that Anker advertises. Unfortunately I barely use them. Prefer using the sport NB10, as it is much more comfortable to me and never falls out no matter what I’m doing. I really don’t like the around the neck feeling, thats just me. What is has over the NB10 is better button controls. You can’t play a previous song with NB10 and it becomes real irritating after a while.
TLDR
NB10 - very comfortable to wear, always stays in, about 5-6 hours use with music at max or close to max. my at work headphones
Lite - 12 hours, maybe a little more with music. Fits good in the ear, nothing like the NB10. same 1 hr 30 mins to charge to full from dead, maybe a little longer. No need to worry about charging to full if don’t have much time. The Soundbud Life(haven’t tried) should be a better version.