BM Premium Pack of 2 NP-FV70 Batteries & Charger Kit for Sony FDR-AX53 HDR-CX455/B HDR-CX675/B HDR-CX330 HDR-CX900 HDR-PJ340 HDR-PJ540 HDR-PJ670/B HDR-PJ810 FDR-AX33/B FDR-AX100 Handycam Camcorder
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- NP-FV70 NPFV70 Li-ion Battery for Sony Handycam Camcorder
- Battery Specifications - Energy Storage Capacity: 2540mAh /Voltage: 7.2 volts, Chemistry: Li-ion
- 100% Memory Free, Super Long Time Recording
- Battery has a one-year warranty
- Includes Qty 2 NPFV70 2540mah Batteries + Rapid AC/DC Battery Charger + Micro Fiber Cleaning Cloth
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Bring your camcorder back to life with a new battery. Make sure you never miss another once-in-a-lifetime moment by having a new NPFV70 battery specifically designed for your Sony Handycam Camcorder. Our rechargeable batteries are engineered to meet or exceed OEM specifications and feature the latest battery technology, including advanced circuitry, voltage regulation, and thermal circuit protection. Our batteries include a one-year warranty.
Compatible with the following camcorders
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When I got these batteries, I decided to give them a "life test" in my camcorder by playing back video (which uses less power than shooting video) to see how long they would run. On each of the two BM batteries, I fully charged the battery until the light on the charger LED turned green, then put it into the camera and let it playback video until the camera stopped functioning. I then fully charged each battery and repeated the test.
Note that if you were shooting video, the batteries would not last as long as they do during playback - also with my camera you might shoot with the LCD screen or the internal viewfinder enabled which would also make a difference, so these "battery life" times should be used for comparison not for absolute usable time in the field.
I did it this way because it was easily repeatable. I played the same video footage for all tests.
On the first battery, I got 3 hours 20 minutes on the first test, and 3 hours 34 minutes on the second test.
On the second battery, I got 3 hours 46 minutes on the first test, and 3 hours 49 minutes on the second test.
I then tried the same test with my 5-year-old and very used genuine Sony NP-FV70 battery pack. It ran for 5 hours, 42 minutes - more than 50% longer than either of the BM batteries.
Additionally, I noticed that when playing back video that the BM batteries showed "0 minutes left" on the camcorder while playing back for the last 45 minutes to an hour of operation - but I left the camcorder running until it just stopped.
Additional info - The camera indicates an approximate lifetime for the battery, so I noted that at the start of each test.
Battery 1: Test 1: 246 minutes Test 2: 284 minutes
Battery 2: Test 1: 269 minutes Test 2: 333 minutes
So I guess I'm going to keep these since they were so inexpensive - basically $15 each, but I'm not going to depend on them to last very long recording video... I'll just use them if my sony battery quits on me.
I don't know if these may improve with time (both tests showed a little better results on the second test over the first), or if perhaps they were made with cells that were not all that fresh, or if they might have been subject to bad storage conditions at some time, but the lifetime results seemed disappointing - considerably less than a 5-year old Sony NP-FV70.
Additionally, it is really awkward to get these batteries into the provided charger, although they did fit into the camera pretty easily. The Sony batteries click nicely into the Sony charger.
I noticed the BM charger has only 2 pins wired, (one on each end of the connectors to the battery) whereas the equivalent Sony charger has 3 pins wired. This charger does come with a car cord, so you can charge the batteries while in the car, but I didn't try that function.