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Search: Posts Made By: Alex Dolgin
Forum: Sony HVR-V1 / HDR-FX7 April 10th, 2008, 04:07 PM
Replies: 10
Views: 3,497
Posted By Alex Dolgin
Damon, Jyrki Hokkanen summarized Li-Ion care...

Damon, Jyrki Hokkanen summarized Li-Ion care exactly right. In addition, only high end Li-Ion batteries have fuel gauge circuits built-in. The only reason ever to cycle a Li-Ion battery is to...
Forum: Sony HVR-A1 and HDR-HC Series March 16th, 2008, 07:56 AM
Replies: 7
Views: 7,303
Posted By Alex Dolgin
"I wonder if these lithium batteries are damaged...

"I wonder if these lithium batteries are damaged at all, by a fast-charger?"
In general C/2 or slower is a good rule of thumb. A 1AH battery (C=1) should not be charged by more than 1/2A. While...
Forum: Sony XDCAM EX Pro Handhelds February 27th, 2008, 11:20 AM
Replies: 31
Views: 8,798
Posted By Alex Dolgin
You are thinking from the technical point of...

You are thinking from the technical point of view, instead of business angle. Have you heard of some inkjet printer companies that design their printers not to accept generic cartridges?
As far as...
Forum: Sony XDCAM EX Pro Handhelds February 27th, 2008, 11:06 AM
Replies: 31
Views: 8,798
Posted By Alex Dolgin
duh... did not think of it. as soon as it works,...

duh... did not think of it. as soon as it works, you will receive a case of the U600 batteries on the house.
Forum: Sony XDCAM EX Pro Handhelds February 27th, 2008, 10:58 AM
Replies: 31
Views: 8,798
Posted By Alex Dolgin
It is not black and white, if you loaded them...

It is not black and white, if you loaded them 45/105wh it is about .42, which is not bad. Loading the U60 33/56wh is .58 which is worse. You might get lucky and get away with it, but the general rule...
Forum: Sony XDCAM EX Pro Handhelds February 27th, 2008, 08:11 AM
Replies: 31
Views: 8,798
Posted By Alex Dolgin
Brian, you identified the problem correctly....

Brian, you identified the problem correctly. Still, let me add a little more in depth explanation. What you experienced was more of a simptom than a problem (the battery internal circuit breaker...
Forum: Photon Management February 15th, 2008, 06:02 AM
Replies: 5
Views: 2,524
Posted By Alex Dolgin
The only reason I can think of (without knowing...

The only reason I can think of (without knowing specifics of your charger) is it would be very long charging of almost 24 hours. 1.25A charger is not powerful enough for your belt.
Forum: JVC GY-HD Series Camera Systems January 30th, 2008, 07:47 PM
Replies: 8
Views: 2,952
Posted By Alex Dolgin
To add to this excellent summary, the AB battery...

To add to this excellent summary, the AB battery is stressed out much less, so it will last longer. When a small capacity battery like the JVC is asked to deliver lots of power, it wears out much...
Forum: Panasonic DVX / DVC Assistant January 22nd, 2008, 05:54 PM
Replies: 189
Views: 92,638
Posted By Alex Dolgin
It is true for Sony, not Panasonic. Panasonic...

It is true for Sony, not Panasonic. Panasonic does not put any smart chips in their batteries. I already posted a guess on another forum, might be trying to run the camera while charging. It can only...
Forum: Sony XDCAM EX Pro Handhelds January 14th, 2008, 08:12 PM
Replies: 37
Views: 9,073
Posted By Alex Dolgin
It is my understanding that the EX style...

It is my understanding that the EX style batteries has new "fuel gauging" circuitry in them, similar to AB batteries. Is it possible that when you guys are talking of self discharging while on the...
Forum: Open DV Discussion January 6th, 2008, 08:14 PM
Replies: 7
Views: 2,434
Posted By Alex Dolgin
Levi, keep in mind that the Li-Ion based...

Levi, keep in mind that the Li-Ion based batteries (Dionics) self discharge about 2-3% /month. NiMh like Hytrons a bit faster around 5-10% /month. So if you put them on a charger once a week or so,...
Forum: Home, Away From Home January 1st, 2008, 07:09 PM
Replies: 97
Views: 30,973
Posted By Alex Dolgin
It is a good question. Shipping Fedex or UPS,...

It is a good question. Shipping Fedex or UPS, they travel on their own cargo planes. DOT (dept of transportation) in general allows for unregulated shipping of under 100wh batteries. It is the big...
Forum: Home, Away From Home January 1st, 2008, 06:54 PM
Replies: 97
Views: 30,973
Posted By Alex Dolgin
Unfortunately this is not practical. In my recent...

Unfortunately this is not practical. In my recent dealings with UL and other battery experts I asked the same question. The guys were just smiling and shaking their heads - the amount of energy...
Forum: Home, Away From Home January 1st, 2008, 06:46 PM
Replies: 97
Views: 30,973
Posted By Alex Dolgin
Dave, unfortunately there is truth to this, not...

Dave, unfortunately there is truth to this, not just rumors. If you scroll up to my message #18, you will see some scary looking evidence.
You are right, that internal defects are the biggest evil,...
Forum: Home, Away From Home December 30th, 2007, 03:02 PM
Replies: 97
Views: 30,973
Posted By Alex Dolgin
They limit to 2 spare batteries. Look at the...

They limit to 2 spare batteries. Look at the "special case" in the table...
Forum: Home, Away From Home December 29th, 2007, 11:44 AM
Replies: 97
Views: 30,973
Posted By Alex Dolgin
This picture is self explanatory. A recent...

This picture is self explanatory. A recent incident with a video crew traveling on assignment to cover Anna Nichole Smith death... http://dolgin.net/Li-IonFire.jpg Also, there was a total loss of a...
Forum: Sony XDCAM EX Pro Handhelds December 20th, 2007, 02:29 PM
Replies: 15
Views: 5,093
Posted By Alex Dolgin
I can also ask Santa, and see which one will...

I can also ask Santa, and see which one will respond first :-)
Forum: Sony XDCAM EX Pro Handhelds December 20th, 2007, 07:49 AM
Replies: 15
Views: 5,093
Posted By Alex Dolgin
Anyway you can take a picture of the battery...

Anyway you can take a picture of the battery bottom so the contacts are visible? I 'd like to show it to some people here...
TIA
Forum: Sony XDCAM EX Pro Handhelds December 20th, 2007, 06:30 AM
Replies: 15
Views: 5,093
Posted By Alex Dolgin
At this point just thinking about it :-) All...

At this point just thinking about it :-)
All the web pictures of the new EX style battery show it looking down at it. Do you know if the contacts are similar to the NPF970 battery? Can it physically...
Forum: Sony XDCAM EX Pro Handhelds December 19th, 2007, 09:37 PM
Replies: 15
Views: 5,093
Posted By Alex Dolgin
Technically, you are right. Need to find out...

Technically, you are right. Need to find out first if the input accepts more than 12V or not. Most likely it *will* accept the same range as the battery voltage. Hard to imagine that there is not a...
Forum: Sony XDCAM EX Pro Handhelds December 19th, 2007, 12:45 PM
Replies: 15
Views: 5,093
Posted By Alex Dolgin
Unless there is a mistake...

Unless there is a mistake http://www.bhphotovideo.com/c/product/526424-REG/Sony_BP_U60_BP_U60_Lithium_Ion_Battery.html the new Sony battery is 14.4V nominal (16.4 fully charged)
You should be OK...
Forum: Digital Video Industry News December 11th, 2007, 03:45 PM
Replies: 2
Views: 2,703
Posted By Alex Dolgin
Dan, while it is true that there is a lot of...

Dan, while it is true that there is a lot of progress being made in that direction, that is making the batteries that can discharge high currents (for power tool applications, etc.) and accept high...
Forum: Sony HVR-V1 / HDR-FX7 October 30th, 2007, 03:54 PM
Replies: 11
Views: 9,071
Posted By Alex Dolgin
We have a limited number of new LIS970 Lenmar...

We have a limited number of new LIS970 Lenmar batteries (missing the blister packaging); standard 3 year factory warranty.
*Only $57.00 e.a.*
-sold out
Forum: Sony HVR-V1 / HDR-FX7 October 28th, 2007, 06:05 PM
Replies: 11
Views: 9,071
Posted By Alex Dolgin
Not all clones are the same. Lenmar LIS970 has a...

Not all clones are the same. Lenmar LIS970 has a new chip, works with the hvl-lbp LED light besides the cameras.
Forum: Photon Management October 10th, 2007, 01:27 PM
Replies: 9
Views: 3,305
Posted By Alex Dolgin
Well, the message that you received stating that...

Well, the message that you received stating that the 65WH belt delivered more than an hour, can not be possibly refering to the same light that you are using. It is technically impossible to power a...
Showing results 151 to 175 of 284

 


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