Replacing the original battery completely degraded and become unmanageable after 3 years.
Not much to say than the other guests, but it deserves 5 stars adds to his score.
This MTB virtually no heat, and is still at 40% charge after 30 hours of moderate use, 2G and 3G.
Honest battery and no surprises. Nothing extraordinary, but like that of origin when it was new. And my faith, when my old works again as a new S2 S2, I'm happy
(See my utilisaiton and condition, no reason to change)
The suite in one month, to report if something has changed.
