(2 Pack) NP-FW50 1200mAh Extended Rechargeable Battery, AC/DC Rapid Home Wall and Travel Charger with Car and European Adapter, HDMI to HDMI Mini Cable, Transcend 16GB Memory Card for Sony

I have a NEX 5K for a year now. Purchased an extra battery soon after getting the camera. Just returned from 3 week in Africa and prior to leaving purchased another battery. This gave me 2 while on game drives and one back in camp charging. Most of the time, the battery lasted for 8 hours of of the 2 game drives. Only twice did I have to swap batteries during a game drive. No power at night to charge the batteries. Most of my photography is stills not movies. No matter what camera you own, digital photography uses battery power. One should have no less than 2 batteries to insure you have power during your days picture taking.

Right to the one thing I wish was different; fixed cable for the "Plug-in Plate." For travel, one can always take the small single battery chargers; however, it would have been nice to haul the Multi Battery Kit instead. On the plus side, taking several single battery chargers means you have a spare. I'll probably attach it to my camera stand in studio and leave it there. Naturally, does the job of charging batteries well. It's a bit of a complex device for what it does, but not an issues for me. If you have two or more a9 bodies, you'll most likely have at least four batteries, so this is a nice way to charge them. Keep in mind, it does not charge a single battery faster than the single charger, so four batteries take 480-600 minutes from empty to full charge. It wold be very unusual for me to have more than one or two discharged, so not an issue. If I found myself having more discharged batteries (using two bodies), I'll buy additional batteries.