Using NiMH rechargeable batts in torches

[Phil2008]

Id thought I would give it a go as I get through quite a few packs of alkaline batts every year.

Ive bought some UNIROSS Performance 2600series, Ive recharged them for the first time and loaded them in the torch. At the moment its nice and bright, but my fear is when I come to use the torch in a few weeks, it wont be as bright, as rechargeable loose their energy more so then non rechargeables so Im told.

So have you ever used NiMH rechargeables in torches and if so how did it compare to non rechargeable?

 

[Phil2008]

My torch takes the D size batts, as Im still in the dark ages and use the old style torch. I've slightly upgraded as I use the Xenon bulbs that makes a much brighter light.

 

[Phil2008]

The only problem with using rechargeable batteries in torches which are designed for normal batteries, is they are not as bright. This is because AA rechargeable batteries are 1.2v, but normal AA batteries are 1.5v - so a pair of rechargeable AAs gives you a 0.6v/20% loss.

Yeah thats what I thought too, but then after looking on the net, I came up with this......

Using 1.2 V rechargeable batteries will have no effect on the use of the equipment. In fact an alkaline battery only benefits from 1.5 V voltage at the beginning of its discharge. Then, it drops constantly to well below 1.2 V. Finally, it drops to around 0.6 V. Most equipment will work happily on anything between 0.9 V and 1.5 V. Unlike alkaline batteries where the voltage drops quickly, rechargeable batteries offer a more constant voltage around 1.25 V throughout the entire period of use.

That is why the latest rechargeable batteries will actually outperform alkaline batteries in equipment calling for a constant and high level of energy input, such as digital cameras, flashes, camcorders, computers, portable phones, CD players, toys, gadgets - well just about anything.

 

[Phil2008]

I can tell the difference with my torch. I admit I thought it was my imagination at first, but it's not!

I wonder why the voltage is lower anyway with rechargeables?

 

[Phil2008]

I've bought 2 sets of these for my camera about 3months ago, and I haven't needed to change/charge up the first set so far. I had energizer before and they only lasted about a month before they died in the camera.

 

[Phil2008]

Thanks, I'll get a 2 hour one then. Can you recommend me one?

A few months ago I bought the "Energizer Universal Battery Charger" and it seems to be good, haven't used it much tho yet

Charges AA, AAA, C, D and 9V rechargeable batteries. 3-5 hours charging time (AAA 1000mAh to AA 2650mAh). LCD panel indicating charging status: AA, AAA, C, D and 9V charging; bad (primary cell or fully rechargeable) and 'full' LED indicator.