To all those, who have just registered, because they are in need of a new battery for their FP1(U).
If you do not receive the desired offers, you might want to take a look at this thread as well: Generic battery to replace FP1 battery (shorter, 1,800 mAh)
I can assure, that this solution - for me - is working.
Wishing you all the best and many more years and months fun with your FP1(U).