I confirm the previous bad reviews:
On my two batteries autonomy is ridiculous! instead of holding a day and a half semi intensive use as with the original battery, neither batteries like the day. Around 18 pm, Curtains.
They are given for 3100 mah but rather revolve around 2000 mah methinks.
It smells of Chinese counterfeiting full nose!
Considering the price too would have had to doubt me ....
Move along