JYJZPB NP-FZ100 Battery and A7iii Battery Charger for Sony A7IV, Sony A7III, A1, Alpha A7RIII, A7R IV, A9, A9 II, A6600, A6700, Alpha 9S, A7R3 A7S III, A7 RIII Battery, 2 Pack

I love this thingI have Gopro battery chargers, insta 360 battery chargers, security cam battery chargers / etc but this is my favorite one. The case / charger is simple and durable. I love that you have multiple options to charge (though I only have used usb c).Really cool

Works great but does not work as power brook.

Amazing! So helpful! I had 8 hour photoshoot -and these batteries were life savior!!

The battery is good, but takes a while to charge while in camera compared to OEM battery. Since the case is included I still think this is a good buy, expect you should be conscious of which battery you have in camera, if you only plan to go out with one battery.

Reliability is everything in client work, and this product just WORKS. After a year and then some of (almost) daily use powering an A6700 in nature and small-events professional work, these batteries have performed like champs, have never power-fluctuated while in use (which causes the camera to go crazy and overheat, something that happens with my A6000’s NP50 batteries when I let the NP50’s get below thirty percent), even when I use these batteries down to twenty five percent. However, keep in mind that the average shoot on these batteries is three hours, and, starting from a freshly-charged battery at 100 percent, I will usually still have 50 or 60 percent left by the end of the shoot, so I usually have lots more left in them when I get back home and recharge them again for the next day. The charger is the batteries’ carrying case, and the whole unit can double as a USBC power bank; although, I myself would never risk uncharging my camera batteries just to charge up a phone unless I absolutely had to. But it’s nice to know you can. What more could you ask for? HUGE five-stars.

DB-FZ100the mechanical- looks well built; cover fits/closes well- batteries are held snug; required some force to "snap"/"unsnap"them in place; if battery surface is not parallel to case surface (that's where the force is needed), they're not in place and the charge light will not come on- card holder locks in place well; no instructions on how this locks so I was afraid i was going to crack something by pushing/pulling on parts; I found it easiest to pry (still somewhat difficult with larger fingers; I'm 5'5" with average hands) next to the card holder to flip the card holder; cards are held snugthe electrical- there is no internal battery to the case and I didn't expect one- the camera batteries supply power to be used as a power pack- the USB-C port is input only; used to charge the camera batteries within the pack; you cannot use this port to charge another device (plugging my Samsung, usb-c to usb-c, actually drains my phone to charge the camera batteries)- the micro USB port is input only; used to charge the camera batteries; you cannot use this port to charge another device- the USB-A is the only output port when this unit is used as a power pack; (It cannot fast charge or super-fast charge my Samsug phone using my own cable);- only a USB-A to USB micro cable is supplied; use this to charge the camera batteries in the pack; no adapter/charger is includedOverallThe worst of this product: no instructions whatsoever. No explanation of what to expect with the charge/discharge lights (lights are red when charging, green when fully charged; blue lights when discharging).Owned for 6 months now: they seem to stay in my camera for as long as the original Sony battery before swap out. I bought this for the batteries and charger. The power pack usage is a bonus which I don't intend to use unless an emergency arises. I use a small camera case, and the charger size could be reduced if a cover wasn't incorporated (just a tad larger than I would like). Would definitely buy again

Into my 3rd year and still kicking good.

I shoot professionally and on long jobs or gigs where I'm shooting a ton of photos, like sporting events, I chew through batteries pretty quick in my A7RV. I bought this setup thinking it would work 75% as good as my OEM batteries and as far as I can tell, they are just as good. They report the life to the camera just fine so I know how much longer I have on a full charge and the case works great for recharging. I liked these so much, I bought a second set.