Sony NPFW50 Battery

Product Information

Comprehensive safety features built with a high-quality fire-resistant construction and surge protection The charger has multiple circuit protection to prevent over-charging short-circuiting and overheating a) the product you are asking Sony to price match must be identical to the one being sold by Sony, including matching brand, model number and colour (“Qualifying Product”); A micro USB cable is required and not included. Charging requires 5V 2.1A USB power. USB chargers that powerful are not common. Most chargers will be 1A or less. Using a less powerful charger will still work, but charging will take longer than it would with a more powerful charger. Energy stored in the battery is turned in to heat. The heat sink and fan are there to dissipate that heat. Testing Methodology

When battery voltage is lower than 1%, the A6000 displays a slash across its battery indicator. When it goes somewhat lower it will power off and upon powering on displays BATTERY EXHAUSTED. I found with the Sony battery, when the unloaded battery voltage was 7.39 volts or the 20 ohm loaded voltage was below 7.01 volts, it displayed a slash across the battery indicator. When the unloaded voltage reached 7.23 volts or 6.96 with a 20 ohm load, it displayed BATTERY EXHAUSTED. Thus the camera shuts down well before the battery itself disconnects its output and that is indicated on the charts at that 6.9 volt line. All values above 6.9 volts are shaded yellow indicating the operating range and that shows the batteries with highest capacities are active twice as long as the weakest. After seeing that it worked, I took it apart. There’s not much inside. The case is either glued or plastic welded together. I would not recommend disassembling the charger. Price / advertising errors (technical issues, misquotes, or listings which are suspected to be incorrect). RAVPower or Neewer are the best batteries. While they don’t meet their labeled capacity, they are close. What they do have is higher tested capacities than the labeled 1020mAh of a genuine Sony battery. There has been considerable discussion on the Sony Alpha A6000 camera batteries since the camera was released in early 2014 because the relatively small battery does not have a large capacity. Much of the Internet and forum information has not had much value as users make vague assessments of what they seem to notice. I've been an electronic tech in Silicon Valley for decades. The capacity of my Sony battery was 1020 miliamp-hours at a nominal 7.4 volts. Other brands have often been rated higher while informal user assessments have tended to indicate the Sony battery has more capacity than off brands. I found that true for off brands in 2014 but since 2015 have been buying DSTE batteries that actually last a bit longer than the Sony battery. Although they are rated at about 180% of the Sony capacity, they don't have that much more relative capacity.

Specifications

Batteries will slowly discharge over time. This is an issue with high drain rechargeable Ni-MH batteries. There was almost no change in charge of the FW-NP50 batteries over the course of a week. Self-discharge is not a problem you have to worry about. Is it possible that the voltage monitor in the a6000 might "misread" the voltage of a third party battery, and thus drain the battery past the normal cutoff point (i.e., Battery Exhausted) that is monitored in the a6000? (I guess anything is "possible" so maybe I should ask if it is somewhat likely). Differences in price mean you can get 4 RAVPower or Neewer batteries for the price of 1 Sony battery.

My Sony A7 gets about 2 hours of life out of a battery. A 500mA load was used because it would drain the cells in approximately 2 hours. At the end of the week, all of the batteries read 0.02V lower. This is a negligible amount. You would not notice the difference in charge from a battery that sat for a week. All of the batteries started as showing a 100% charge in my Sony A7. Neewer & RAVPower USB Battery Charger When the cell reaches 3V, it is considered fully drained. Discharging the cell past 3V can shorten the life of the cell. The cells are in series, so 6V was used as the cutoff for the batteries.Opening the RAVPower and Neewer batteries did not reveal any information on the cells used. Internally, the battery protection boards appear to be the same. I would not be surprised if they were made at the same factory. The Best Third-Party NP-FW50 Battery Is… Besides the Sony battery, I bought 3 other brands. Only one of the batteries, number 7, was unable to power the camera for more than a few minutes thus bad. Battery 2 and 5 were functional though with poor capacity. Two batteries, number 5 and 6 initially seemed bad in that they held little capacity after seemingly being charged until I had performed a couple full discharge and charge cycles, after which they have been performing ok though with weak capacity. Thus it may be possible to recover a faulty battery by fully discharging it and then recharging. The spare batteries I bought in 2014, numbers 2 through 6 had lower capacity. Batteries bought in 2015, numbers 8 through 15 from DSTE have more capacity than the Sony. I bought 4 more from DSTE after starting the test, numbers 16 through 19 that show modestly greater capacity than identical types with a couple year's use. Thus at least with that brand, it does not show significant aging. c) the Qualifying Product must not involve one or more Exclusions, see below at end of these Terms for Exclusions. Exclusions may be updated from time to time. If Sony approves the customer’s price match request the below terms apply. If Sony does not approve the customer’s price match request the customer will be informed of this. Terms that apply where price match is approved: