Quick battery help question.

The_blue · 21 May 2007 at 15:04

I need some rechargeable C cells for a dive torch.

I've priced them up, aprox 12 quid for 4 2600mAh

I've not seen conterters to make AA into C sizes. I have loads off high power AA batteries (2700mAh)

My question is:- does a 2700mAh AA last as long as a 2600mAh C cell? Am i right in thinking they about the same power?

geuben · 21 May 2007 at 15:21

2700mAh means i can provide 1mA for 2700hrs or 2700mA for 1hr, or any variation in between.

daz · 21 May 2007 at 15:24

Even though the energy stored may be the same (say 2600mAh each) I think the larger sized cells (C, D) are able to provide a higher current than AAs or AAAs. Hence why they used to be used in big ghettoblasters etc.

(Recall the scene from "Do the Right Thing" - where Radio Raheem has to go to a shop to buy 20 'D' Energizers for his stereo.

)

Haircut · 21 May 2007 at 15:27

Wikipedia said:
Can be replaced with alkaline AA cell using plastic sabot (stub case)

http://en.wikipedia.org/wiki/List_of_battery_sizes

Don't ask me where you buy the cases from though

geuben · 21 May 2007 at 15:30

think i might have seen them on the high st, but its a competitor so can't name. I always thought that the different sizes were due to the cost of manufacture. i.e cheaper to make a larger higher capacity battery than a small one. Hence why there used in things light stereo's, the stereo is fairly large anyway so using large batteries isn't inappropriate.

geuben · 21 May 2007 at 15:33

hope this isn't breaking any rules. google L64AQ.

Tomsk · 21 May 2007 at 16:07

Is cost the issue?
I've seen C cells at 5000mAh, but at >£5 each.

The_blue · 21 May 2007 at 21:54

It is a cost issue and a waste of time buying for something used twice a year.

I have a good AA charger and good AA cells.

On the other hand my main tourch takes 8 D cells at 10000mAh :eek: