Battery quick discharge

[mhamilton74]

Hi I have 3 Sony tablets, a Z4, Z3 and a Z2 and all have developed the same problem at nearly the same time.

While using it the battery gets to around 50% and then shuts down due to battery being flat.

When you plug the charger in its already back at 50 %

All 3 have been system restored but the problem continues.

I get one, maybe 2 could develop the same fault but all 3, at the same time?

Any help or guidance much appreciated.