I've been shooting with Sony for years and trust me, that battery sticker shock is real. I tried to save a buck with those cheap knockoffs once, but I learned my lesson the hard way. I had a generic battery swell up inside my camera during a summer hike... I literally had to use tweezers to get it out without damaging the contacts. Never again. For a big trip like Yellowstone, I'd suggest getting at least one official Sony NP-FZ100 Rechargeable Battery Pack. It's expensive but you wont get those annoying 'unsupported battery' pop-ups that ruin the moment. If your budget is truly maxed out, the only third-party ones I've had decent luck with lately are the SmallRig NP-FZ100 USB-C Rechargeable Camera Battery packs. They're a bit cheaper and have a built-in charging port which is handy. But honestly... nothing beats the peace of mind of the official ones when you're out in the wilderness.

Been thinking bout your trip. It is worth biting the bullet on the official Sony NP-FZ100 Rechargeable Lithium-Ion Battery for your primary. For spares:

• Hahnel Extreme HLX-FZ100 Li-Ion Battery is rugged and pro grade.
• Watson NP-FZ100 Lithium-Ion Battery Pack is a decent budget pick. Be careful with the no-names tho. They tend to swell up and get stuck in the camera.

> I saw some cheaper ones on Amazon from brands like Wasabi and Neewer but I am honestly terrified of them exploding Honestly I was super paranoid when I first started too. The Nitecore NFZ100 Smart Battery has been a solid middle ground for me. Its way cheaper than the Sony brand but built with better quality control than those random brands you see on Amazon. I've been using a couple for about a year now with no complaints... they actually have a phone app to check the battery health which is pretty cool. Since youre on a budget, you might want to try a DIY power setup. I often hook up an Anker 533 Power Bank 10K to the camera with a USB cable while I'm hiking. The a7iii can pull power from the bank to keep the internal battery topped up. It basically acts like a massive external tank. Its way safer than putting a sketchy knockoff inside your body and it works well for long days. Just keep the bank in your pocket and youre good to go... Yellowstone is gonna be incredible!

Re: "I've been shooting with Sony for years and..."

• Honestly, I get being nervous about third-party stuff. The NP-FZ100 is a smart battery, so the camera is picky. If you want to save cash without the fire hazard, I suggest these specific options:
• The SmallRig NP-FZ100 USB-C Rechargeable Camera Battery is probably your best bet. It has a built-in USB-C port so you can charge it directly with a phone cable, which is huge for travel. I've used them for a while and they dont throw those annoying warnings.
• If you really need a kit, the Wasabi Power NP-FZ100 Battery 2-Pack with Dual Charger is the standard budget pick. Just make sure to get the ones with the newer chips. Be careful with the super cheap ones tho. I would suggest staying away from anything that doesnt have a clear brand name. And since youre going to Yellowstone, keep the batteries in an inside pocket. Cold kills battery life way faster than youd think... literally drops the percentage in minutes if they get chilled.

Wow ok that changes things. Gonna have to rethink my approach now.

Re: "Wow ok that changes things. Gonna have to..."

• I totally feel your pain on this!! It is so incredibly frustrating how expensive these little blocks of plastic are when you have already dropped a fortune on the camera. I was in the exact same boat before my last big trip and it seriously stressed me out trying to decide if I should risk a fire or just go broke... the price difference is just wild! It honestly makes me so nervous thinking about my gear dying while I am out in the middle of nowhere. If you need high-quality alternatives that are still cost-effective, I have two specific recommendations. First, the K&F Concept NP-FZ100 Replacement Battery with USB-C Charging Port is fantastic because it allows for direct charging. This is very efficient for travel since it eliminates the need for an external charger. Second, I have had great results with the Nitecore UFZ100 USB-C Rechargeable Battery. It features an integrated power indicator that shows the current charge level directly on the battery casing. Both of these options have been incredibly reliable for me and they dont cause the camera to display any warning messages. Love how much stress these save!

> I saw some cheaper ones on Amazon from brands like Wasabi and Neewer but I am honestly terrified of them exploding or ruining my new camera Honestly, after using Sony gear for a long time, the fear of them blowing up is a bit much, but the performance gap is real. If you really want to save cash and still sleep at night, just go with ProMaster. I have been using their stuff for years and they have never let me down or caused errors. Just grab whatever they have for the Sony series at a local shop. They are way more reliable than the bottom-of-the-barrel Amazon stuff and they actually last. Just avoid the super cheap no-name stuff and you should be totally fine for your trip. I usually keep a few in my bag and honestly cant tell the difference from the originals most of the time.