NP-BX1 Lithium Batteries: 6 Month Status

The battery capacities after six months are, of course, lower:

Sony NP-BX1 - OEM Wasabi - 2014-08-17

Sony NP-BX1 – OEM Wasabi – 2014-08-17

I didn’t bring the HDR-AS30V camera along on the Hudson River ride, simply because each battery lasts about 1.5 hr in 1920×1080 @ 60 fps mode and I wasn’t up to replacing batteries during the ride, then charging all three every evening. Obviously, the camera wasn’t intended for that use case.

Somewhat surprisingly, the Wasabi batteries deliver the same continuous run time as the Sony battery: 1:30 vs 1:33. I used 250 mA for those discharge curves, but I think something around 500 mA would better match the camera load.

I’m sorely tempted to drill a hole in the camera’s case and wire in a honkin’ big prismatic lithium cell.

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  1. #1 by madbodger on 25-August-2014 - 10:26

    I used to have a big Honeywell strobe light powered by 4 nicads, then I switched to a camera with a proprietary flash interface, and their flash took forever to recycle on ordinary AA cells. So I pulled the big nicads out of the Honeywell, wired ‘em into the proprietary flash and bam, it recycled in less than a second. Looked like a bomb with all those cells taped to it, though.

    • #2 by Ed on 25-August-2014 - 11:55

      bam, it recycled in less than a second

      The surplus strobe I used to light falling objects recharged almost instantly from the bench supply, drawing a peak current around 1 A, and took slightly less than forever from the (single!) AA alkaline cell it was designed to use.

      Moah powah!

  2. #3 by rkward on 25-August-2014 - 10:43

    > I’m sorely tempted to drill a hole in the camera’s case and wire in a honkin’ big prismatic lithium cell.

    Since everything is engineered to a ridiculous price these days, out-of-the-box modifying is about the only option left in order to get products to work the way they were supposed to. Of course I’m assuming that the engineer didn’t design it poorly to begin with …

    • #4 by Ed on 25-August-2014 - 12:03

      design it poorly to begin with

      The battery / SD hatch seems breathtakingly complex: slide sideways to disengage two latches, then pivot to open, which means I can’t just drill a hole in the case. I’m thinking of a slot through the side that extends well below the sliding tabs on the hatch and clears the skeleton mounting frame.

      The case may be designed specifically to prevent me from doing that…

  3. #5 by Red County Pete on 25-August-2014 - 16:27

    designed specifically to prevent

    My Canon A470 PowerShot uses that same battery/card system, but it does have a DC input jack–under a very delicate hatch used for the I/O ports. Sigh.

    • #6 by Ed on 25-August-2014 - 17:50

      a very delicate hatch used for the I/O ports

      Oh, yeah, that’s the other hatch along the bottom of the camera, which unsnaps to dangle from a pair of thin plastic straps. Behind it we find USB Micro-B, Micro-HDMI, Expansion, and a 3.5 mm (!) jack for either the mic or “Plug-in Power”, depending on whether you believe the manual or the label.

      I’d foresee Gorilla Tape in its future, except that anything on the surface of the camera will prevent it from entering the various mounts that clamp around the outside. The camera itself has no mount points at all, so it’s really sleek. [mutter]

      • #7 by david on 26-August-2014 - 14:23

        either the mic or “Plug-in Power”, depending on whether you believe the manual or the label.

        Actually, it’s both: “Plug-in Power” is a euphemism in the audio “industry” for a ~2V, 2mA DC bias supplied from the recorder/camera to power the preamp inside the electret microphone, imposed over the mV AC signal from the mic back to the recorder.

        • #8 by Ed on 26-August-2014 - 15:45

          That makes perfect sense and provides more information than the manual: thanks!

          Now that I know what to expect, the jack provides 2.79 V open circuit and 300 µA short circuit on the tip and ring terminals. They don’t say anything about accepting stereo mic inputs

          For no good reason, I was assuming the “power” went into the camera, supplanting its power-over-USB function, but … as we all know, hell hath no fury like that of an unjustified assumption.