Jag35 Battery Test

Posted in All, Blog, Gear Reviews

For the past couple of days I have been testing the Jag35 battery to see how it holds up powering the Canon 7D, Marshall 5” monitor, and Zoom H4n. For $250, this is a great solution to power your rig.

In an earlier post I tested this battery with just the Marshall monitor and got over 8 hours of life. Compare that to the two hours you get from four AA batteries. Jag35 then came out with a LP-E6 Adapter cable; aka a cable that lets you power your Canon camera with their battery. It also has a auxiliary 2.1mm connector to power another device such as the H4n.

I figured the best way to test is to record nonstop with all devices plugged in. On the first test I had the camera and H4n recording the entire time. I stopped recording every 10 minutes and started again, formatting when needed. The H4n was recording 4 channels with AGC on and NOT in stamina mode. Now this is a pretty intense test but I wanted to see how long it would last with non stop use. On most of my shoots, there is a lot of time spent setting up new scenes, changing angles, changing lenses, etc. I will use this for my next shoot and update how long it lasted.

Here are my results for my boot camp like test:

When powering the camera, monitor and H4n I got 3 hours and 40 minutes of life. When none of lights would light up on the battery, I got about 50 minutes before everything shutdown.

When powering the camera and monitor I got 3 hours and 50 minutes of power.

When powering just the monitor I got over 8 hours of life but may have gotten more. Once all the lights turned off on the battery I stopped the test because I didn’t know it would continue to power.

Some features I’d like to see would be a way to tell when the battery is fully charged. You can push the battery bar button to see how much juice you’d have but it would be nice to have something blink to know it is fully charged. Not a deal breaker though. Also, sometimes the first light goes out rather quickly but doesn’t seem to affect the battery life. Again, not a deal breaker and doesn’t change my decision to buy.

Overall I think this battery is a great buy. When powering just the monitor you will get all day out of it. Powering a camera, audio recorder and monitor will shorten this life but for quick run and gun, especially b-roll, this one battery will come in handy. I usually go through 1-2 sets of double AA batteries with the H4n, and shoot on a third battery with the 7D in a full production day. As for the monitor, well I can’t be changing batteries every two hours so this battery was a must buy for me.

Gear seen in video all from Jag35

12v Cable
LP-E6 Adapter Cable
DSLR Stand
Ball Head Mount


  1. Full Review and Testing of the Marshall 5” Monitor – The Official Site of Rob Ruscher
    January 18, 2011

    […] One of the reasons I hesitated buying the Marshall monitor was because of the powering options. Using 4AA batteries for a couple hours of life just doesn’t cut it. Jag35 came out with their battery. Amazing price and runs the monitor all day. Jag35 also came out with a Canon battery adapter cable and H4n cable. This means I can run my entire rig with this one battery. I have done tests that you can read about here. […]

  2. Dan Wang
    February 21, 2011

    Hey Rob, I have a question about delivery time of the battery. I just ordered a Jag35 9200mah battery over the weekend and was wondering how long it took for them to ship out your battery. I’ve ordered from Jag35 plenty of times before but their ship dates were always unpredictable.

    • Rob Ruscher
      February 21, 2011

      Yeah their times always fluctuate but it shipped in less than a week and was at my door in less than a week after that. Hope you enjoy the battery!

  3. Dan Wang
    March 11, 2011

    Hi Rob, sorry to bother you again with a question, but I received my battery and everything works great. However, when I left it in the charger for an entire day, and when I went to test the LED lights, it didn’t change from when I plugged it in. It was still at 2 out of 3 green lights. Am I doing something wrong? Is there a specific method of charging it?

    • Rob Ruscher
      March 12, 2011

      Hey man not a problem. I have seen that also but it has not affected the battery life.

  4. mel haynes
    June 2, 2011


    Thanks for posting this and doing the testing on this. I have just received the jag35 battery system and am encouraged by this.

    One question though: did you have to do anything special with the step down cables? I notice the voltage for my Marshall monitor and H4n are 5volts and the step down cables are set at 6volts. Not sure if I have to do any adjustments or if it will just work.

    • Rob Ruscher
      June 2, 2011

      I have my marshall monitor plugged directly into the battery. I use the step down cable to power the zoom.

  5. Amos
    August 19, 2011

    Hey great post. I was wondering if the lp-e6 cable adapter sends the same 7.4v to the camera as well as the h4n? Because the h4n is rated to take only 5v. thanks


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