3000 mAh AA battery for Flash ?

[ajfotofilmagem]

I wonder why until now there is no flash with battery "lithium ion" as well as existing cameras ... : Must be because of the real risk of the battery exploding with drainage of large amperage in short time. However, the batteries "lithium polymer" drain amperage allow up to 30 times greater than the nominal amperage in a short time. So far, they are only used in model aircraft engines. Batteries are expensive, but has the best power to weight ratio currently.

 

[Drizzt321]

I wonder why until now there is no flash with battery "lithium ion" as well as existing cameras ... : Must be because of the real risk of the battery exploding with drainage of large amperage in short time. However, the batteries "lithium polymer" drain amperage allow up to 30 times greater than the nominal amperage in a short time. So far, they are only used in model aircraft engines. Batteries are expensive, but has the best power to weight ratio currently.

They do, but rapid discharging (or charging) generates a lot of heat, and lithium batteries are prone to have bad things happen when they overheat.

 

[Loswr]

I wonder why until now there is no flash with battery "lithium ion" as well as existing cameras ... : Must be because of the real risk of the battery exploding with drainage of large amperage in short time. However, the batteries "lithium polymer" drain amperage allow up to 30 times greater than the nominal amperage in a short time. So far, they are only used in model aircraft engines. Batteries are expensive, but has the best power to weight ratio currently.

The chemistry of Li-ion/Li-Po batteries isn't optimal for high-drain short-duration current draw like filling a capacitor, but rather for moderate-drain, more sustained current draw.

 

[ajfotofilmagem]

I wonder why until now there is no flash with battery "lithium ion" as well as existing cameras ... : Must be because of the real risk of the battery exploding with drainage of large amperage in short time. However, the batteries "lithium polymer" drain amperage allow up to 30 times greater than the nominal amperage in a short time. So far, they are only used in model aircraft engines. Batteries are expensive, but has the best power to weight ratio currently.

The chemistry of Li-ion/Li-Po batteries isn't optimal for high-drain short-duration current draw like filling a capacitor, but rather for moderate-drain, more sustained current draw.

I saw friends using electric helicopters, extract exorbitant amperage of battery Li-Po specifying 30C with no problem. This means that can drain a current of 30 ampere of battery with nominal 1 ampere, for a short period, and it continues to work perfectly. Obviously, it is necessary to dissipate the heat generated, which can be problematic in a flash. But the battery itself, is capable of releasing extremely high amperage for a few seconds.

 

[brad-man]

Plenty of photographers put their trust in the 2700 mAh Maha Powerex batteries http://www.mahaenergy.com/batteries/ which are optimized for power intensive devices such as on camera flash.
http://www.protog.com.au/buy/maha-powerex-2700mah-nimh-aa-rechargeable-batteries-4pk/2700H

I've got 20 of their AA cells and ticked the box for the 8 cell smart charger.
http://www.protog.com.au/buy/maha-powerex-mh-c801d-8-cell-aa-aaa-battery-charger/801

I'm constantly amazed at the capacity of these batteries. Find what you want at Protog which seems to have excellent information, then check eBay for local pricing.

-pw

How long have you been using them? I also started my rechargable AA collection with a dozen PowerEx 2700 batteries around 3-4 years ago. I only have two left now. They are very good if used after a fresh charge, but I found them to drain rather quickly (while idle) and have limited recharge cycles. Shortly after I bought the PowerEx batts, I picked up an eight pack of eneloops and I still have all of them (plus around 40-50 more). I still use the MaHa charger though. I've tried a few other brands, but none are even close to the quality of Eneloops. I haven't found the need to try the XX type since they are around 25% more expensive and have only 1/3 as many cycles.

 

[alexanderferdinand]

Ad Cheopos or "normal" NiMh: I always prefer LSDs, because I know, they are charged. A bit less, but not nothing.

 

[cliffwang]

Ad Cheopos or "normal" NiMh: I always prefer LSDs, because I know, they are charged. A bit less, but not nothing.

+1
LSD is the way to go for rechargeable batteries, and Eneloop is the number one choice.

 

[surapon]

Thanks to all my dear teachers and my friends.
Thanks for New Technical infor. and New Ideas that I never know before.
Have a great weekend.
Surapon

 

[Marsu42]

I always prefer LSDs, because I know, they are charged. A bit less, but not nothing.

+1000 just from today: I grabbed my external NiMH external power pack, and guess what - it was completely discharged after some time of no usage, I didn't expect it to go that low that fast. There was no time to recharge it, so I had to shoot with my Eneloop AA which don't loose their charge :-o

 

[surapon]

I always prefer LSDs, because I know, they are charged. A bit less, but not nothing.

+1000 just from today: I grabbed my external NiMH external power pack, and guess what - it was completely discharged after some time of no usage, I didn't expect it to go that low that fast. There was no time to recharge it, so I had to shoot with my Eneloop AA which don't loose their charge :-o

Dear Marsu42
You Mean =
http://www.amazon.com/Powerex-Maha-MH-C801D-Eight-Charger/dp/B000E5S648

Right?---If Yes, I will order 2 of them---Thanks
Thanks
Surapon

 

[Click]

Dear Surapon

The Powerex Maha MH-C801D Eight Cell is the one that I use. It's a great charger with built-in battery deep-conditioning system, and selectable soft and rapid charging.



This is a great thread, there is a lot of useful information here. Thanks to all.

 

[surapon]

Dear Surapon

The Powerex Maha MH-C801D Eight Cell is the one that I use. It's a great charger with built-in battery deep-conditioning system, and selectable soft and rapid charging.



This is a great thread, there is a lot of useful information here. Thanks to all.

Thank you, Sir, Dear Mr. Click
I will order 2 of them to day---How do you think about Powerex AA rechargtable Battery, compare to our Sanyo Eneloop ?
Thanks again
Surapon

 

[Click]

Dear Surapon

Sorry I can't help you on that one. I have never tried Powerex battery, I use only Sanyo Eneloop (white).

 

[surapon]

Dear Surapon

Sorry I can't help you on that one. I have never tried Powerex battery, I use only Sanyo Eneloop (white).

Thanks you, Sir.
I ask, Because of Higher cost, Powerex = 2700 mAh, 8 = $ 29.95 ( Amazon)

And Eneloop white, = 2000 mAh, 8 = 20.19 ( Amazon)

Nice to talk to you, Sir, Have a great Sunday.
Surapon

 

[RGF]

I used powered 2700 mAh but they don't hold charges that long. So I switched to imedion which work well for me. Also in a pinch I use lithium AA

 

[surapon]

I used powered 2700 mAh but they don't hold charges that long. So I switched to imedion which work well for me. Also in a pinch I use lithium AA

Thank you, Sir, Dear RGF.
Yes, Me too, When emergency with out power out let, I have Litium AA in my Backpack for spare too.
Thank you, sir.
Surapon

 

[tron]

The Powerex Maha MH-C801D Eight Cell is the one that I use. It's a great charger with built-in battery deep-conditioning system, and selectable soft and rapid charging.

Until it decides to fry your batteries ... melt its own plastic by not stopping charging. It has happened to me!
In addition, it seems I am not the only one (judging from Amazon.com feedback on this product)...
(The first that stopped working on my charger was the soft charge button...)

 

[surapon]

The Powerex Maha MH-C801D Eight Cell is the one that I use. It's a great charger with built-in battery deep-conditioning system, and selectable soft and rapid charging.

Until it decides to fry your batteries ... melt its own plastic by not stopping charging. It has happened to me!
In addition, it seems I am not the only one (judging from Amazon.com feedback on this product)...
(The first that stopped working on my charger was the soft charge button...)

Thanks you, Sir, Dear Tron.
Thanks for your infor.
Now, Poor Surapon---Now What will I do, 2 sides of Powerex Maha MH-C801D= Good or ----Bad ???
Thanks.
Surapon

 

[tron]

The Powerex Maha MH-C801D Eight Cell is the one that I use. It's a great charger with built-in battery deep-conditioning system, and selectable soft and rapid charging.

Until it decides to fry your batteries ... melt its own plastic by not stopping charging. It has happened to me!
In addition, it seems I am not the only one (judging from Amazon.com feedback on this product)...
(The first that stopped working on my charger was the soft charge button...)

Thanks you, Sir, Dear Tron.
Thanks for your infor.
Now, Poor Surapon---Now What will I do, 2 sides of Powerex Maha MH-C801D= Good or ----Bad ???
Thanks.
Surapon

I have not given up on Maha because of that (I do not know though if it this was wise). I got the Maha/PowerEx 9000 model that is a more sophisticated charger. Unfortunately it charges only 4 batteries at a time. I have it for almost 2 years and it has been fine. No complaints apart from the fact that it refuses to charge some older (but in good condition) batteries.

 

[surapon]

The Powerex Maha MH-C801D Eight Cell is the one that I use. It's a great charger with built-in battery deep-conditioning system, and selectable soft and rapid charging.

Until it decides to fry your batteries ... melt its own plastic by not stopping charging. It has happened to me!
In addition, it seems I am not the only one (judging from Amazon.com feedback on this product)...
(The first that stopped working on my charger was the soft charge button...)

Thanks you, Sir, Dear Tron.
Thanks for your infor.
Now, Poor Surapon---Now What will I do, 2 sides of Powerex Maha MH-C801D= Good or ----Bad ???
Thanks.
Surapon

I have not given up on Maha because of that (I do not know though if it this was wise). I got the Maha/PowerEx 9000 model that is a more sophisticated charger. Unfortunately it charges only 4 batteries at a time. I have it for almost 2 years and it has been fine. No complaints apart from the fact that it refuses to charge some older (but in good condition) batteries.

Thanks you, Sir, Dear Tron.
I already order one, and should have in my hand next 2-3 days.
Yes, Sir, I will report back to you, If it kill my Rechargeable Batteries.
Have a great day, Sir.
Surapon