Kastar Battery Replacement for Sony BP-U60 and PXW-FS7/FS5/X180 PXW-FX6/FX9 PMW-100/150/150P/160 PMW-200/300 PMW-EX1/EX1R PMW-EX3/EX3R PMW-EX160 PMW-EX260 PMW-EX280 PMW-F3 PMW-F3K PMW-F3L Camcorder

One thing to keep in mind is that aftermarket batteries will never be superior to the original Sony brand. The battery does the job however, I feel it drains out a tad faster.

As good as an OEM Sony battery, excellent runtime with plenty of reserve power. Fits and functions exactly like a factory Sony battery. LED level indicators show approximate charge state when pressed.

Battery works great but doesn't come with a charger.

Great purchase, especially for the price. Gives me over 4 hours of battery life on my FX6, and they’re compatible with the Sony charger -

These batteries seemed like a great deal at first, and despite my skepticism I decided to order two of them for use with my FS7. They worked fine for a while, but both of them ended up completely dying and shutting off the power to my camera in the middle of a crucial shot. Even though the battery LED indicators said that it had 100% power, they're now basically useless and won't power on at all. I've tried power-cycling it over and over, leaving it on charge for large amounts of time, plugging it into other cameras/accessories that take the same battery, and no luck all around. Tried contacting Kastar for customer service to see if I could get a replacement shipped out, but no luck. I am willing to change this review if the company makes it right and sends me replacements. Other than that, I would say either go with name brand batteries or just bite the bullet and go with V mount.

I got two of these used as part of a recent used FS5m2 purchase. They were totally depleted when I got them home, but they charged just fine using the Sony and Kastar chargers.Not sure if 2 batteries would be enough for recording 8-10 hours of action sports footage with no AC power possible, I bought this as a spare, to go with the Sony BP-U30 and 2x identical Kastars.I bench tested continuous recording, and I was able to record more than two hours of continuous footage from each fully-charged battery, over two charge cycles. I didn't test it down to the last minute in the field, I swapped the battery for a fresh one when it hit less than 25%. I recorded all the footage I had planned to getIn the field, these batteries performed remarkably well. The batteries easily lasted two hours of continuous recording each. Now, I was conserving power by turning off the viewfinder after framing my shots and starting recording, so I don't know how long they will last while shooting with viewfinder on, will come back for that.Despite some others' complaints, these batteries worked out for me, and for a big savings compared to the brand-name battery.

Great long lasting battery

These are a great alternative to uber-expensive SONY batteries. I have been using these with my SONY FS5 and very pleased with their performance. I can't compare the battery life with the same capacity SONY battery, but as they are sooooo much less expensive, I highly recommend them. Some people claim 3rd party batteries will reset the camera's clock, but I haven't experienced that with these batteries in my FS5.