Topic: 722 battery longevity?

[Lil Kim Jong-Il]

Has anyone run their 722 battery into the ground?  What capacity cell and how long did it last?  What was the shutdown behavior of the 722?

I'm running a test with the 6000mAH cell starting with a full charge and recording audio using phantom and the back light on.  I'm at 4.5 hours now and the battery indicator shows 50% at 7.0V.   Can this be correct?  I'm getting much better longevity than I expected and I don't trust it.

Edit for update:

The unit shut down after 5:15 of record time.   Plenty long enough for my needs. 

The bar in the battery display is not an accurate indication of percent time remaining (maybe not intended to be).  I didn't stand over it but I think it shut down after about 14 minutes of low battery indication blinking.

I'd still like to hear what others are getting from their batteries if anyone has run to shutdown.

[krebsy]

Does it shut down gracefully, saving the file first?

[Lil Kim Jong-Il]

Mine did.  File was closed and the machine powered down.  Last file segment opened no problem. (I was splitting at 2G so I got 5 big files and the tail)

[Genghis Cougar Mellen Khan]

Has anyone run their 722 battery into the ground?  What capacity cell and how long did it last?  What was the shutdown behavior of the 722?

I'm running a test with the 6000mAH cell starting with a full charge and recording audio using phantom and the back light on.  I'm at 4.5 hours now and the battery indicator shows 50% at 7.0V.   Can this be correct?  I'm getting much better longevity than I expected and I don't trust it.

Edit for update:

The unit shut down after 5:15 of record time.   Plenty long enough for my needs. 

The bar in the battery display is not an accurate indication of percent time remaining (maybe not intended to be).  I didn't stand over it but I think it shut down after about 14 minutes of low battery indication blinking.

I'd still like to hear what others are getting from their batteries if anyone has run to shutdown.

I'm assuming that's including sending phantom power?

[Lil Kim Jong-Il]

I'm assuming that's including sending phantom power?

Yes.  Phantom and LCD back light.

[Genghis Cougar Mellen Khan]

I'm assuming that's including sending phantom power?

Yes.  Phantom and LCD back light.

I need those guys to re-design the power supply for my air conditioner, I'm thinking they might be able to make it run on 2 aa NiMH bats for 8 hrs. 

Do you think runing at different sample rates would have any significant difference to consider in power consumption?

[JasonR]

Do you think runing at different sample rates would have any significant difference to consider in power consumption?

It should.  I'll do some comparison tests this weekend.

I'd still love to see some HD vs. CF tests.  I really don't want to spend a ton of cash on a big CF card, but it could be an awesome setup depending on its longevity and possible cooler running temperature.

[scb]

when i ran 24/192 it definitely used up more juice.  of course that's 2x the data writing to the drive than 24/96

[Genghis Cougar Mellen Khan]

when i ran 24/192 it definitely used up more juice.  of course that's 2x the data writing to the drive than 24/96

I'd also imagine there would be a curve in the usage, being less efficient at higher operating temperatures.

[cd2go]

hey guys, I'm considering breaking the bank to upgrade from my JB3 to a 722 but was wondering where i could get a higher mAH battery---and is replacing the stock battery as easy as opening the unit up and popping in the new one?...also, Lil' Kim...what bit rate/res were you running when you got 5 hours?

Thanks!

[Lil Kim Jong-Il]

I was running at 24/96.  The battery is a Sony camcorder battery format that is externally mounted to the unit.  You don't have to open up the 722 to change batteries.  Field swap is very quick and easy.

You can use any battery in that format.  I bought a 6000mAh battery but there are higher capacity batteries now.  I cannot recall where I ordered these but I got the link from a thread here so if you search for "722 battery" you'll find it.  I understand that they may have increased the price of the batteries since the 722 was released.  Last time I looked the price was more than I remember paying.

[monochromic]

has anyone run the stock (1500mAh?) battery till it's dry? just wondering how long it would be likely to last at 24/96 taking s/pdif from a v3 -- i'll be hitting three shows (1.5hr approx.) this weekend and am hoping to run the stock battery and recharge daily before the next show.

edit: answer on the 7xx team board, http://taperssection.com/index.php?topic=53636.msg855360#msg855360

[mmedley.]

The stock battery now is a 4600mah. At least that is what came with mine back in December.

[phr]

For 6000 mah batteries type "NP-F960" into ebay.  They are about 30 bucks (non-Sony).  I think there might be an NP-F970 now with even higher capacity.

[CQBert]

When I ran a 722 this is what I was using for power...  hope it helps..

http://www.batterybank.com/master/npf960.html

CQBert