Of battery packs... Does amp rate make a difference?
Posted 01 May 2006 - 08:48 AM
Posted 01 May 2006 - 09:13 AM
I've seen over-the-shoulder battery packs on Ebay that are listed as being 12V/12Amp for very cheep and I've seen camera places that sell 12V/5amp at around 30-40% more. Is the 12v/12amp battery belt a better deal or will I wreck things up if I use it? I've been told that the amp rate just determines how long it'll hold a charge. What sez you all?
The cheap ones are probably sealed lead acid. They are cheaper than other rechargable batteries. Also don't fully discharge them or they will die quickly. I often use sealed lead acid batteries without any problems.
Posted 01 May 2006 - 09:15 AM
I've been told that the amp rate just determines how long it'll hold a charge
Yes. It's not an amperage, but a charge in amp.hour. for instance a 5 A.Hour battery can deliver 5 A during an hour, or 1 A during 5 hours etc.
So a 12 A.H battery will last more than twice as much the 5 A.H one will.
Also, it would hold better a high intensity for a short time if needed. If it's a video camera you are feeding it doesn't matter much, but for a film camera, it may happen that you need a stronger battery (esp. with high speed work for instance)
Posted 01 May 2006 - 12:24 PM
Also, some batteries may not have the current delivery capability required for high-load devices, so you need to be sure it can deliver the "Amps" needed without a significant voltage drop.
Posted 02 May 2006 - 10:25 AM
Posted 02 May 2006 - 10:41 AM
Posted 02 May 2006 - 04:15 PM
I have a recelled 300mAh internal NiCd for my Scoopic (grey) that is fine for that camera but it doesn't give enough juice to power the Kinor. Same for a 300mAh wallwart (although stated output is always inflated on cheap stuff).
Posted 03 May 2006 - 09:32 AM
Posted 03 May 2006 - 09:52 AM
Posted 03 May 2006 - 09:37 PM
Waht you can do is to have an ampermeter on the line whilst the camera is running and see how many amps it uses while working. Let's say it's 500 mA, then a 5 AH battery would then last 10 hours