377 Watch Battery Voltage

[128 GB] Worked perfectly in my MacPro 5.1   I had to remove some other ram I had in my machine as it was not compatible. (watch out for the voltage of the Ram and if it registered)

[Alkaline] I merely checked voltage, discharge rate, and mah for the battery in the older Gossen flash/ambient meter, and found that the Exell battery A220/504A matched. A square tubular sleeve of cardstock, no tape required, positions the battery properly in the meter. Remember to remove battery when the meter is not in use, however, for remember- it is still an alkaline battery, and those beasts tend to be subject to leakage, especially the stuff from Duracell, in my experience.

[22.5 V] I use a (film) Leitz-Minolta CL. This camera originally used the 625 mercury battery. The 625 has been discontinued due the mercury content. The A625PX will fit the camera, but the voltage is slightly higher. My CL battery circuit was adjusted to accept the higher voltage of the A625PX. The new battery keeps my CL working. B&H is the only place I can find these new batteries.

[6 V] Whereas the voltage output of alkaline batteries has been shown to decrease over use and time, silver oxide batteries have a much more constant voltage output over the life of the battery. For this reason I prefer to use silver oxide batteries whenever possible. I chose the Exell S28PX battery to use in my Pentax digital spotmeter, which I've used periodically from time to time over the past two years, including in cold winter weather, and I've been very satisfied with its performance.

[0.315 lb] In a rechargeable battery the important things are 1. Ability to hold charge 2. Provide the expected voltage at terminals when charged 3. Capacity to hold enough charge (mAhour capacity) 4. Ability to be charged repeatedly When I got the batteries they were not charged but this was stated so I charged the batteries. All 16 charged up and provided expected voltage (actually a little bit higher, about 1.44 Volts). I don’t have a battery tester so I am unable to say if they charged up to expected mAhour capacity. However, since they seem to be performing OK , I will assume they charged appropriately. I am unable to say anything about how many times they can be charged since that is a long term test. So far they have performed. Five stars. Ajeet S.

[0.8 oz / 23.8 g] I purchased this adapter to provide an unlimited power source for my Canon R5 using an Anker PowerCore Elite III battery and charger. Prior to using the adapter in my camera, I first plugged the battery in separately and verified that the output voltage was correct. I found the unloaded output voltage delivered to the camera is 8.47 volts which is slightly higher than the Canon battery voltage of 8.05 volts. When placed into the Camera, I found that my R5 functioned properly with no apparent loss of functionality. I'm now performing a long-term test external to the camera before putting it into normal service.

[18 x 1/4"-20] Breaks out power from the primary battery to all the chotchkies on your rig.The cable boosts the battery voltage to work with the FX9.

[0.495 lb] One of the Q&A’s says the Bescor BLS50AC dummy battery adapter kit is not compatible with the Olympus E-PL9.  I asked Bescor ( answers@bescor.com ) why the kit is compatible with the Olympus OM-D E-M5/M10, but not the Olympus Pen E PL9, since all three use the same Olympus BLS-50 battery.   The response was: “It will work. Your camera just needs to be added to our list.” The Bescor is 8V 3A. The Olympus battery is 7.2V 1175 mAh (1.175A).  I did some online research to see if a device built for 7.2V could operate at 8V.  One person describing himself as an engineer posted that 7.4V Lithium batteries actually span a 6V to 8.4v voltage range depending on state of charge of the battery.  Another “senior electrical engineer” said that because all devices are designed with some voltage tolerance value, a 7.4 volt device means 7.4 volt +/- 1 to 1.5 volts.  Still other posts indicated that you can use a 3A power adapter on a 1.5A device.  By logical extension, I figured (I don’t actually know) that since the PL9 uses a 7.2 volt battery, it is probably designed to also work at 8 volts, and is also okay running at 3A. Based on the response from Bescor and the Internet voltage and amperage responses, I decided to purchase the Bescor and use it with my PL9.  I haven’t seen any sign of overheating or other problems with this setup so far, but will update this review if that changes. I did not deduct points for the need to leave the battery compartment open because I knew that would be the case when I bought it.

One of the Q&A’s says the Bescor BLS50AC dummy battery adapter kit is not compatible with the Olympus E-PL9.  I asked Bescor ( answers@bescor.com ) why the kit is compatible with the Olympus OM-D E-M5/M10, but not the Olympus Pen E PL9, since all three use the same Olympus BLS-50 battery.   The response was: “It will work. Your camera just needs to be added to our list.” The Bescor is 8V 3A. The Olympus battery is 7.2V 1175 mAh (1.175A).  I did some online research to see if a device built for 7.2V could operate at 8V.  One person describing himself as an engineer posted that 7.4V Lithium batteries actually span a 6V to 8.4v voltage range depending on state of charge of the battery.  Another “senior electrical engineer” said that because all devices are designed with some voltage tolerance value, a 7.4 volt device means 7.4 volt +/- 1 to 1.5 volts.  Still other posts indicated that you can use a 3A power adapter on a 1.5A device.  By logical extension, I figured (I don’t actually know) that since the PL9 uses a 7.2 volt battery, it is probably designed to also work at 8 volts, and is also okay running at 3A. Based on the response from Bescor and the Internet voltage and amperage responses, I decided to purchase the Bescor and use it with my PL9.  I haven’t seen any sign of overheating or other problems with this setup so far, but will update this review if that changes. I did not deduct points for the need to leave the battery compartment open because I knew that would be the case when I bought it.

[USB: 5 V / 2 A] I have two of these chargers. They are well built and powerful. However, that power comes with a string attached - if you want to rapidly charge a Mavic 3 battery the input voltage has to be greater than produced by a typical full charged 12 volt battery. DJI tells us this - stating that we should use the charger only with the car running. However, the specifications state that the input voltage needs to be 12.7 - 16 volts DC. Which led me to assume the 540 amp hour 12 volt battery bank in our expedition truck, which delivers 12.8 - 12.9 volts when fully charged would be sufficient. That is not the case - I need to have somewhere between 13.1 and 14,1 volts minimum (closer to 14.1 I suspect) for the rapid charger to work with an Mavic 3 battery. I can work with that as long as I charge during the day with solar input raising the voltage of the battery bank or when the truck's engine is running. This charger will work fine charging a Mavic Mini 2 battery bank with the supply at 12.8 (perhaps lower as well - I've not tried that). It might also charge the Mavic 3 battery via the USB 2 - USB 3 outlet but at 10 watts I'd presume that would considerably slower than the 65 watts possible with USB 3 - USB 3 outlet. I have not tried my car chargers with large portable power banks like those from Goal Zero or Jackery. I suspect the same restraints would apply - rapid USB 3 to USB 3 of a Mavic 3 battery will require solar or other supplemental input. Again - not a problem if you plan for that. I've given the charger 5 stars because it is great and works well as long as one respects the design parameters.