I use Hahnel batteries in my 722 - they fit as well as the Sony ones.
Chris.
>
> From: "oryoki2000" <>
> Date: 2006/06/29 Thu PM 11:00:08 GMT
> To:
> Subject: [Nature Recordists] [gear] 722 battery options
>
> The Sound Devices 722 uses about 1 amp per hour of operation. The
> largest Sony camcorder battery is the L series NP-970, rated at
> 6600mAh. So the NP-970 should power the recorder for 6+ hours.
>
> This 6 hour figure was recently confirmed in notes posted by 722
> owners on the TapersSection.com forum. The tests were conducted with
> continuous recording, using mics that need phantom power, and with the
> recorder display backlighting on.
>
> The NP-970 is substantial, weighing 12oz/350g, so it's not the best
> choice for a brief recording session. But 6 hours of power should be
> plenty for an all-day outing.
>
> The Sony NP-970 costs between $50 (eBay) and $100 (retail store).
> There are cheaper batteries with similar power capactiy from other
> manufacturers. However, several 722 owners reported problems using
> non-Sony batteries. They don't fit the 722 quite as well, and the
> battery case is not as strong. So it's probably wise to spend a
> little more to get the genuine Sony battery.
>
> Sony makes smaller camcorder batteries that fit the 722. Here are two:
>
> NP-570 2200mAh, 5.1oz/145g, $50
>
> NP-770 4400mAh, 8.2oz/230g, $70
>
> The 722 can also be powered by an external DC power source. Rob D. and
> Martyn have both posted descriptions of external batteries that use
> rechargeable "D" cells, useful when you plan to be away from mains
> power for an extended period. (Rob's will attract the attention of the
> bomb squad in any airport you pass through).
>
> One tidbit I learned today is that the 722 can be set to power up and
> start recording when the external DC power is turned on. The recorder
> will gracefully shut down and save the file when the DC power is
> turned off. This feature, plus an external timer to turn the power on
> and off, allows the 722 to make unattended recordings on a schedule.
> This would be very useful for research -- No need to climb the
> 100ft/30m Ceiba tree in the dark to capture the dawn chorus!
>
> --oryoki
>
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> "Microphones are not ears,
> Loudspeakers are not birds,
> A listening room is not nature."
> Klas Strandberg
> Yahoo! Groups Links
>
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>
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