I have 6 NiMh batteries. No matter what I do when I put them in the camera they never show as having full charge. I suspect I am overcharging them by either leaving them in the charger too long (but shouldn’t it stop ?) or by charging them when they are not fully discharged. So what I’m planning to do is find a torch or similar, discharge the batteries fully using that and then charge. But should I leave them in the charger ? Can I ? Any tips ?