good and inexpensive replacement battery 2

For my cameras I use for many years as a second and third batteries not originals, but cheaper models.
Even when Patona the fit in the housing and charger is good, although it is looser in Ladegarät as the Fujifilm NP-W126, the electrical contact is thereby not impaired.
He has not blown up so far (8 months usage with many charging cycles), which has happened before at other Chinese battery.
The capacity of my copy I guess in about 2/3 of the original battery, with a slightly declining trend over the operating time. Here the original is clearly better, but also 3 to 4 times more expensive.
In this respect, a good alternative to the original, price / performance ratio is very good.