Powerextra 2 Pack Replacement NP-F970 Battery Compatible with Sony DCR-VX2100, DSR-PD150, DSR-PD170, FDR-AX1, HDR-AX2000, HDR-FX1, HDR-FX7, HDR-FX1000, HVL-LBPB, HVR-HD1000U, HVR-V1U, HVR-Z1P

I have a few things that use this battery, and they last quite the long time. They are heavy, they are bulky, and I believe they're using 6 cells in them, I think that's how many I counted on the one I accidentally ran over. Which on that note, yeah the battery was destroyed as about 1200lbs ran over it, but 4 of the 6 cells survived without damage, that's impressive and speaks to the build quality. Also the damaged cells didn't explode, so that was interesting. I don't know if my Highlander's tires could handle that explosion. Since I don't trust dealer tires on cars.BUT back on point, I bought it for my little 7in monitor for cameras, and whatnot, my ZOOM F6 (which it's really tricky to put on that device and practically doubles its weight, but that's ZOOM's fault for making the area to work in so tight), and some studio lights have support for two of them. So, this DEFINITELY ticks the value, amperage, and function for the money. Durable, inexpensive, and they have so many different "flavors" too. Like one that sacrifices 1A for an LCD read out. Will buy again. I also bought the ravpower version, which were near the same price for half the longevity as these. But you can buy this capacity with charger for like $50 and it's a nice charger. Love finding obscure quality companies like this.

These batteries work as listed.

These take forever and a day to charge but, they will last just as long as it takes them to charge. I use these in some of the devices I employ for mobile video recording and interview captures. They work will to power some of my LED devices. No charging or discharging issues. Recommended.

As other reviewers have said, these are definitely NOT 8800 mAh batteries, but more like 6600, like is standard with this size battery. However, for just $17/battery, they are a great value.In my photography journey, I've used a variety of different brands of batteries. Of the brands I have tested (and my testing was not exhaustive, so I can't make generalized claims), Powerextra batteries tend to perform the best while also lasting the longest. All brands can put out inferior products, since no one tests EVERY SINGLE ITEM that goes out the factory, so there's always a possibility to get a dud. This is why I can't make sweeping generalizations about any of the brands I've used.What I CAN offer are some tips to get the most from the batteries you buy.First, since these are lithium ion batteries, you don't want to drain them completely. Drain them too much, and they'll die a quick death. This is true of any brand of lithium ion battery. Ideally, you'd switch batteries when the ones you're using drop below 20%. Of course, this isn't always possible or practical. Just don't let them hit 0%, and if you do, get them on a charger as quickly as possible. (But not for long, as explained in the next paragraph.)Heat is also deadly to lithium ion batteries, so don't leave them in a parked car in the middle of summer. This also means you want to be careful with "fast charging". This can be fine until you get them up to about 80%, but after that, you want to use a slower charging rate. For the same reason, you want to let the batteries cool down for an hour or two after using them before putting them on a charger.And finally, you don't want to charge them to 100% and put them on a shelf. This has been my biggest problem, and I had to learn to store batteries at a middle charge, such as 50%, and then charge them right before I want to use them. Of course, you also don't want to store batteries under 20%, so if you do drain them that far, give them a partial charge before storing them.Follow these basic tips, and you'll get a lot more usage out of your batteries. Some folks have reported getting 3 times as much useful life out of lithium ion batteries when following these guidelines.

Just received these batteries the other day It's hard to tell how they will perform after several cycles of charging over time. That being said I am impressed with the performance. My Atomos Ninja Blade recording at 1080p ran for over four hours with one battery, no issues and had left over power reserves.So far both batteries are charging to full capacity no problem and they fit the Ninja battery bays with a nice solid connection. There is a bit of a down side batteries like this take longer to charge. A battery discharged down to 20% took me about 11 hours to fully charge on my Atomos charger. Granted this is not a rapid charger it takes 3 hours to just charge my small NP F570 2600 mAh battery which is less than one third the capacity of these NP-F970 8800 mAh batteries. No doubt a better charger would improve the charge time duration. Batteries weigh about 10oz each the Ninja can hold two batteries so can get quite heavy. Probably not a good idea to stick this on your camera hot shoe. For now I'm giving them 5 stars very pleased with my purchase.

These batteries cost a fraction of the price comparing to the original Sony, but it'll last the same or a little more!

Great product

batteries arrived 75% charge. fit perfectly. i would buy again