722 battery

[mmedley.]

Do those Lenmars come with a warranty? I still dig the Impacts since they have a 1YR warranty. If the Lenmars have a warranty I would consider the change to save $15.

Nevermind...I see 3yr warranty. Damn! That is nice.

[RobertNC]

Will this sucker work with the 722/744's?

http://www.bhphotovideo.com/c/product/465330-REG/Impact_NPF975_NP_F975_Lithium_Ion_Battery.html

I just picked one up.  Have not had time to give it a workout as far as runtime performance.

As far as physical compatibility, no problems.  Pulled it in and out of the unit a bunch of times.  Makes good contact.  Based on the general feel of resistance it feels like just a slightly little more snug fit than the branded Sony NPF970 I've been using. But really slight difference.

At this point I feel pretty confident that most importantly it does not feel so tight to worry about any damage to the unit side male pins, and also does not feel like it will require the commonly mentioned cyanoacrylate reinforcement to keep the female receptacles on the battery side in place either.

Will get back after Ive gotten the time to setup to do a couple of run time evaluations, but at this point so far, so good ....

[Bdifr78]

About how long should a 6900mAH battery run a 722, when not using phantom power?

Thanks,
Joe

[fozzy]

About how long should a 6900mAH battery run a 722, when not using phantom power?

Thanks,
Joe

6-7 hours

[manitouman]

I wonder....I have a dummy cell that I connect a RC Battery pack via tamiya connectors to power the 702. If I got two of these li-ion batteries, could I modify them so that they each have tamiya connectors? So I would still use the dummy cell and these li-on battery packs would connect via tamiya connectors. Can that be done and would it be a good option? Would the AR-7 accommodate both batteries in the bottom of the bag? I'm just thinking out loud actually. Time to get off this machine.

http://thomasdistributing.com/shop/lenmar-lis970p-72-volt-7800mah-batterybrrechargeable-lithium-ionbr-replaces-sony-npf950-npf960-and-f970b-p-1255.html?SP_id=&osCsid=e5mvh6hf2q45s33mfn09gb9qb2

I got this battery, I can run a complete show + plus latenite with the same battery...

[fozzy]

I wonder....I have a dummy cell that I connect a RC Battery pack via tamiya connectors to power the 702. If I got two of these li-ion batteries, could I modify them so that they each have tamiya connectors? So I would still use the dummy cell and these li-on battery packs would connect via tamiya connectors. Can that be done and would it be a good option? Would the AR-7 accommodate both batteries in the bottom of the bag? I'm just thinking out loud actually. Time to get off this machine.

http://thomasdistributing.com/shop/lenmar-lis970p-72-volt-7800mah-batterybrrechargeable-lithium-ionbr-replaces-sony-npf950-npf960-and-f970b-p-1255.html?SP_id=&osCsid=e5mvh6hf2q45s33mfn09gb9qb2

I got this battery, I can run a complete show + plus latenite with the same battery...

This is similar to what I do,.  You will need a special li-ion charger for the modified cells.

[Bdifr78]

About how long should a 6900mAH battery run a 722, when not using phantom power?

Thanks,
Joe

6-7 hours

I just tested overnight.  Half way through the night my V3 battery died so there was no longer any signal going to the 722.  If there is no signal coming in, but the device is still recording, would this still give me a accurate test of the run time with this battery?  Or does lacking an input signal make for much longer run times?

The reason I am concerned is that this 6900mah battery was still running and recording on the 722 at the 10.5hr mark. This seemed odd to me.

Joe

[mmedley.]

About how long should a 6900mAH battery run a 722, when not using phantom power?

Thanks,
Joe

6-7 hours

I just tested overnight.  Half way through the night my V3 battery died so there was no longer any signal going to the 722.  If there is no signal coming in, but the device is still recording, would this still give me a accurate test of the run time with this battery?  Or does lacking an input signal make for much longer run times?

The reason I am concerned is that this 6900mah battery was still running and recording on the 722 at the 10.5hr mark. This seemed odd to me.

Joe

I would imagine yes. That would make a difference if there was no load on inputs. It will also depend greatly on your bit depth and sample rate. Higher rates obviously = more writing to HDD which leads to decreased battery performance. Not sure if you mentioned your setup previously either. Are you running digi or analog out of the V3? Backlight on? Bright meters? CF or INHDD? Being REALLY conservative I can see you getting 10hrs at 16bit or 24/44.1 with the backlight off, meters on lowest brightness setting, running line in. OR you could just have one of those 1 in a million everlasting batteries.

[manitouman]

http://thomasdistributing.com/shop/lenmar-lis970p-72-volt-7800mah-batterybrrechargeable-lithium-ionbr-replaces-sony-npf950-npf960-and-f970b-p-1255.html?SP_id=&osCsid=e5mvh6hf2q45s33mfn09gb9qb2

I got this battery, I can run a complete show + plus latenite with the same battery...

I bought one of these from Buy.com for $53.99 and that included shipping. Ran a test yesterday...hooked into the 702 and charged from there took ~3 hours. Ran with all the lights going and writing at 24/96 with phantom power to the MBHO's and I got ~9 hours of runtime. Does that sound about right? I didn't think I would have gotten that long out of it, but am amazed.

[manitouman]

Is there a proper way to store these batteries when not in use? I probably won't tape with the open rig until a month from now. Should I store completely drained or charge for about a half hour or so just so it has a little bit in it?

Thanks for any info!

EDIT: Found my answers...Never drain completely (whoops!) and store at 40% capacity.

[boojum]

Sound Devices site publishes usage rates of electricity.  A 722 at 24/48 and phantom power draws ~1 amp per hour.  The battery you got should give ~6 hours with a HD to run.  A 702 would run correspondingly longer.  I'd guess you could get close to 8 hours.  Try it and let us know.