Of firstly, when the battery is placed in the camera, it has full bars. Then it after a bit of use, it suddenly goes to half and dies and starts blinking.
Unfortunately the OEM charger doesn't have a condition button and I don't have a original charger handy or know anyone with one either.
The battery Im using is a original NP-e3. the camera has done 40k clicks. assuming normal usage, this would imply that the battery hasn't been charged often (40times assuming 1k shots per charge)
i've ordered a cheaper OEM replacement battery off the bay, and I will try that later during the week.