A source sent me this interesting info:

Sony is planning to update the FZ100 battery to an improved capacity but still the same size and compatibility. It’ll still be called NPFZ but the 100 number will change.

This battery would be retro compatible with most Sony Alpha cameras and give you two instant benefits:

• You have to carry less numbers of batteries
• You waste less time in swapping batteries during long shooting days

So let’s hope this rumor turns out to be true!