93p 6 AA Energizer batteries

super_dad

not in my boots. they were £3.69 for a 6 pack, and £3.99 for the ultimate batteries.

twe

Niklos wrote: »

Why are there never any bargains with C and D batteries?

You can purchase adaptors that will make AA batteries work in C and D slots....

Ellie2758

Aidy wrote: »

the Energizer website has details of all current (!) chargers:

http://www.energizer-eu.com/en/products/rechargeables/chargers

Most seem NiMH but some are both - hope this helps

Thanks, it would appear that I have the compact charger which is suitable for both types and which also charges up AA batteries, which I hadnt realised, doh!

Ellie2758

wizk1 wrote: »

NiMH batteries have a higher capacity (will last longer on a charge) than NiCd. However all rechargeable batteries suffer from what's known as self-discharge which means if they're left unused, they will slowly lose their charge over time. NiCd batteries have a lower rate of self-discharge than NiMH.

Put simply, NiMH batteries are better for high-drain appliances (Digital cameras, walkmans, portable tvs, torches, etc).

NiCD batteries would be better suited towards less draining appliances such as clocks, remote controls, calculators, etc.

I hope this helps

Anth

It is indeed very useful advice, if only I could remember it. Why did they have to call them such SIMILAR things - NiMH and NiCD I mean?? Why couldnt they give them COMPLETELY different names then my brain might stand a chance

seth

Ellie2758 wrote: »

It is indeed very useful advice, if only I could remember it. Why did they have to call them such SIMILAR things - NiMH and NiCD I mean?? Why couldnt they give them COMPLETELY different names then my brain might stand a chance

The names are from the compostion, normal batteries are zinc carbon, NiH is Nickel Metal Hydride, NiCD is Nickel cadmium.

The charge retention of NiH batteries has been addressed and so there is no real need to use NiCD batteries any more, but they can be cheaper to buy.

NiCD also suffer badly from memory effect, so charging them when not flat is not a good idea.

Make sure you do not put these in the rubbish NiCD is really not good as the cadmium leaches into the water and it is a toxic metal like lead!

Just keep dead rechargeable in a bag and drop them off at a recycling facility.

You can also buy Lithium batteries, these come in Lithium ION and Lithium Polymer. The later is the best but costs more, there is a 3rd type of Lithium battery Lithium Phospate. Never buy an unregulated Lithium battery as they will fail if their charge drops below a specific level and explode if the charge exceeds a specific level. Spend the extra and get ones that a regulated: Fitted with a chip to prevent over discharge cell death and overvoltage explosions.

Look out for the special offers at Maplins when they 2 for 1 on NiH and also Budget batteries do some good deals.

rpb

Another difference between NiCd and NiMH is that the NiCd ones suffer more from the "memory effect". The result of this is that with NiCd it's best to run them *right* down and then charge them fully, or you'll find they lose capacity more quickly. I don't think NiMH ones suffer as much from this. No idea what the new "Hybrio" (slow self-discharge, come charged) ones do in this regard, but I think they are more like the NiMH ones.

rpb

Although I use rechargeable batteries a lot, one thing that really bugs me is that lots of chargers don't have an auto-shutoff/timer facility, and I keep forgetting them and overcharging my batteries!

A.N.Other

I got some excellent Uniross 2100mAh Hybrio NiMH rechargables in Wilkos for £5 for 4 (aaa or aa, in a green and red packet). These are the next generation of rechargables that don't discharge themselves over time and come charged up when you buy them (similar to the Sanyo Eneloops mentioned earlier, but lots cheaper). The Hybrios have a lower capacity (mAh) than the regular NiMH batteries, but these quickly loose their charge just by being sat around and after a month of even doing nothing they are often flat.

Also you can get adapters for using AA batteries instead of C or D batteries.

I've done a fair bit of research into this as I'm a bit of tech geek and both me and the kids have loads of battery operated toys!