I went with Cinegears 270WH and their dual charger. It uses the modern efficient cell technology. Of course I can’t fly with that size.
I think I’m the last year they call it 250WH but I suspect it’s the same. Haven’t had any issues. If you want to extend the life of the cells, be sure and disconnect the battery from the camera after a shoot so it will hold its charge ‘forever.’ If you leave the battery on the camera, it does slowly lose charge. I top up the charge the night before a shoot.
You can leave the battery on the charger and it will trickle charge until it hits maximum charge, but I feel safer with it disconnected from everything after a shoot.
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