AA Rechargeable Batteries Lithium 1.5v

[Rappey]

Older cameras use to eat power something terrible. I remember only getting around 50 pics before the battery went flat. Modern ones including powerful dslr,s last so long now.

 

[JohnGC]

There is some unit confusion here.

More than one poster is quoting mWh figures as mAh. This make the capacity seem better than they are by 50%.

EG 3500mWh @ 1.5V is 2333mAh. That isn't to suggest the batteries recommend are bad.

John

 

[Rappey]

There is some unit confusion here

I did see that in the last link I posted, but since most cheap batteries including lead acid are from China the quoted figures have to be taken with a pinch of salt anyway..
I bought some chinese lithium makita batteries at a fraction of the genuine price and they have proven to be at least 90% of the genuine product.

 

[JumbleDuck]

Older cameras use to eat power something terrible. I remember only getting around 50 pics before the battery went flat. Modern ones including powerful dslr,s last so long now.

My favourite camera is a Leica R6.2, which I inherited. The battery only works the self-timer and the exposure meter, so you can let it go flat or even take it out and the amera still works fine. I kept it because it's such an astonishing piece of engineering: 1/2000 s from clockwork, for crying out loud.

 

[Rappey]

I have a draw full of old film and digital cameras. Were the latest tech when they came out, worth next to nothing now .
Now I'm more than happy with the amazing camera on my phone, crazy zoom, hdr, 4k 60fps and so many othervfeatures. Give it a few more years and my phone will be added to the pile of old out of date phones ?

 

[penberth3]

My favourite camera is a Leica R6.2, which I inherited. The battery only works the self-timer and the exposure meter, so you can let it go flat or even take it out and the amera still works fine. I kept it because it's such an astonishing piece of engineering: 1/2000 s from clockwork, for crying out loud.

I think Nikon had a 1/4000 mechanical shutter. Blink and you miss it! Some beautiful mechanisms around.

 

[bedouin]

I think Nikon had a 1/4000 mechanical shutter. Blink and you miss it! Some beautiful mechanisms around.

A 1/4000 shutter does not mean it takes 1/4000 to take the picture - it still takes 1/60-1/100 sec

 

[thinwater]

There is some unit confusion here.

More than one poster is quoting mWh figures as mAh. This make the capacity seem better than they are by 50%.

EG 3500mWh @ 1.5V is 2333mAh. That isn't to suggest the batteries recommend are bad.

John

Opps. Guilt here. I did not look closely. 3500 mWh.

 

[RichardS]

A 1/4000 shutter does not mean it takes 1/4000 to take the picture - it still takes 1/60-1/100 sec

I don't understand. If the shutter speed is 1/4000 of a second then the shutter is open and letting in light for only 1/4000 of a second which is, as penberth3 says, is a lovely mechanical construction.

Richard

 

[JumbleDuck]

I don't understand. If the shutter speed is 1/4000 of a second then the shutter is open and letting in light for only 1/4000 of a second which is, as penberth3 says, is a lovely mechanical construction.

I think what he means is that is that on the R6.2 (say) the shutter is a focal plane one in which one curtain slides open and another one closes after it, so that a thin strip of exposure travels across the film. Any given bit is exposed for only 1/2000 s (say) but exposure is going on for considerably longer.

 

[penberth3]

I don't understand. If the shutter speed is 1/4000 of a second then the shutter is open and letting in light for only 1/4000 of a second which is, as penberth3 says, is a lovely mechanical construction.

Richard

I had to think about it. SLR mechanical shutters are two metal blades or cloth blinds, one follows the other across the film. There's a gap between them as they move, the width of the gap is varied to give different exposure times. Vertical "strips" of the frame are exposed for the, say 1/4000 sec, but it takes longer than that for the gap to travel across the frame. Not a very good explanation.

 

[alan_d]

I don't understand. If the shutter speed is 1/4000 of a second then the shutter is open and letting in light for only 1/4000 of a second which is, as penberth3 says, is a lovely mechanical construction.

Richard

Focal plane shutter - moves a blind with a variable-width slot in it across the front of the film. If the slot is very narrow. each part of the film is exposed for a very short time, but it takes longer to expose the whole frame. Causes odd effects like golf clubs with bent-looking shafts while driving and horses with elongated heads in photo-finishes. (Damn, must type faster.)

 

[Spirit (of Glenans)]

I have a draw full of old film and digital cameras. Were the latest tech when they came out, worth next to nothing now .
Now I'm more than happy with the amazing camera on my phone, crazy zoom, hdr, 4k 60fps and so many othervfeatures. Give it a few more years and my phone will be added to the pile of old out of date phones ?

Might be interesting to check out what sort of prices similar models are fetching on eBay etc. I sold a middle of the road Pentax SLR and an old Finepix point and shoot digital with very low resolution by modern standards, and made enough to buy a reasonable modern DSLR plus change.

 

[KompetentKrew]

With USB port.

Thought I might give them a punt. Round about £10 for two.

Any feedback to report ?

TIA

I looked at them and ended up with rechargeable AA and AAA batteries from Ikea - they are some of the best rechargeable batteries on the market, widely believed to be rebadged Eneloops.

IMO the USB-chargable lithiums are just a little bit expensive - e.g when I need 4 of them in my scanner it is £20 worth of batteries tried up (hardly used) rather than £5.50 worth. It's 4x as much if you drop a torch over the side. It doesn't matter to me if I have to swap and recharge them a little more often.

Also, you can recharge these regular AA and AAA batteries using 12v / USB

 

[Kelpie]

How do they make a 1.5v lithium- I thought the basic chemistry was around 3.2-3.7v per cell. Does every AA have a tiny transformer inside?

 

[Abestea]

I have a Goal Zero Nomad solar panel which came with a AA battery power unit.

I used to have batteries in the handheld VHF and a second set charging through solar panel.

Power bank can be plugged into a pc or plug with a cable and not require solar panel.

Very handy for charging mobile and tablet too.

 

[JumbleDuck]

How do they make a 1.5v lithium- I thought the basic chemistry was around 3.2-3.7v per cell. Does every AA have a tiny transformer inside?

Good question. Looks like this:

 

[LONG_KEELER]

Very interesting responses, Thanks.

I've ordered a couple for novelty value as much as anything else.

They came with a single charging cable that charges both batteries . As mentioned above, only taking 1.5 hours to charge and 1.5v may appeal to many forumites.

They state that you should stay present whilst charging ???

Will report back at a later date .

 

[Mudisox]

I've just ordered a set too. Handheld GPS for mark laying