7.4 Volt Rechargeable Battery Pack

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.

Great light and you can use the rechargeable battery pack.

Jupio BP-828 Lithium-Ion Battery Pack (7.4V, 2670mAh). Very good batery and price...

This was exactly what I was looking for. The battery pack is rechargeable and fits in the flashlight. very easy to use.

Very nice headlamp, and it comes with a rechargeable battery pack.

Have 2 of these out, I purchased the rechargeable battery pack and made a big difference

I have had this light for a few weeks at this point and so far I love it. I got the rechargeable battery pack with it and the battery pack lightens the light up significantly. Battery lasts a long time and the light is BRIGHT! Haven’t had to use it in the weather yet but so far I am super happy with this light.

I purchased the MB-D18 Multi-Power Battery Pack after I purchased my D500. Initially I found that I was consuming rechargeable battery packs on the camera at a rapid rate when out shooting, particularly when downloading images via SnapBridge as I was shooting. The MB-D18 Battery pack gave me the flexibility of utilizing different rechargeable batteries that fit the type of photography I was involved with on different days. Utilizing the larger En-El 18c rechargeable battery packs allowed me to go longer without changing batteries at times when battery changes were not feasible. I would highly recommend the MB-D18 battery pack for any photography enthusiast who wants to be able to have greater flexibility in choosing power sources and the ability to shoot significantly longer without changing batteries!

I use this battery as a back-up to my Nikon battery EN-EL4a rechargeable Lithium-ion Battery Pack. I always use my original Nikon battery but if I am out in the field and my Nikon battery goes down after many shots, I then switch to the the Watson EN-EL4A Lithium-Ion Battery Pack as my back-up until I can re-charge the Nikon battery again at home. I find it's more economical using it that way since there is such a big price difference between the Nikon Battery and the Watson Battery. However the Watson battery is a very good battery and reliable in every way.

Awesome flash light love the rechargeable battery pack and cable