InfoLithium W NP-FW50 Digital Camera Battery

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.

i am only writing to warn people to pre charge batteries before first use. i dont know if some people do or do not do this but all batteries should be charged to its optimal level before the first use this is important to overall batter life, and charge capacitance. some people forget and have complained that the batter is useless or terrible. IF you do this first and the batter is still not up to its optimal level then you can complain.