Hi. Just wondered what everyones opinions are in regards to replacement batteries i.e OEM vs 3rd party, recomended brands etc. The original that came with my 70D is a bit tired (recharge performance shows red). I also have a 3rd party one which completely died today so I'm now looking for a couple of replacements. There seems to be so many stories of batteries not holding charge, being rejected by the charger/camera etc. The only safe bet seems to be the official canon one which is more than a little bit of a rip off. What do you guys use?