Rechargable batteries

Why will a rechargeable battery hold a charge longer than regular Duracell battery? I never did understand this. What ever the reason is, why haven't the disposable batteries jumped on this?

Actually, I've found just the opposite. Rechargeable batteries actually lose their charge at the rate of 1% a day. After several months, there's hardly enough charge left to turn on your camera, let along take photos. The old, one charge batteries, last much longer than that, especially if they're in a cool place.

Several battery manufacturers are now marketing a low self-discharge (LSD) battery with very little, of any, self-discharging. They come pre-charged, too, which is an added bonus.

Look for Sanyo or Panasonic.

Are we talking about two different things?

One seems to be length of charge under use. The ma rating.

The other seems to refer to shelf life.

Good point. Besides, if the equipment is not going to be used for an extended period, get those batteries out. A leak can kill a valuable piece of equipment.

Well about about these Ansmann 2850mAH AA's? What is the mAH of a normal Duracell AA battery?

One thing I notice, high drain electronic devices last much longer on rechargeables than alkaline while other things like flashlights and remotes last longer with alkalines. My assumption is that physically and chemically NiMh stands up better to strong current drain despite having lower voltage than alkaline.

Yasko wrote: One thing I notice, high drain electronic devices last much longer on rechargeables than alkaline while other things like flashlights and remotes last longer with alkalines. My assumption is that physically and chemically NiMh stands up better to strong current drain despite having lower voltage than alkaline.

That is what I thought, or have read. I would be curious to know what is the mAH difference between alkaline vs NiMh battery.

en.wikipedia.org/wiki/AA_battery

The mah ratings are similar. Something to consider is the rechargeable is 1.2 volts while the alkies are 1.5. The alkaline battery would therefore push more current through an equal resistive load. Something like 20% more current would man a lessened operating time before it dies.

chasrich wrote: en.wikipedia.org/wiki/AA_battery

The mah ratings are similar. Something to consider is the rechargeable is 1.2 volts while the alkies are 1.5. The alkaline battery would therefore push more current through an equal resistive load. Something like 20% more current would man a lessened operating time before it dies.

Good information, so are all rechargeable batteries 1.2 volts?

chasrich wrote: en.wikipedia.org/wiki/AA_battery

The mah ratings are similar. Something to consider is the rechargeable is 1.2 volts while the alkies are 1.5. The alkaline battery would therefore push more current through an equal resistive load. Something like 20% more current would man a lessened operating time before it dies.

HawaiiGuy wrote:

chasrich wrote: en.wikipedia.org/wiki/AA_battery

The mah ratings are similar. Something to consider is the rechargeable is 1.2 volts while the alkies are 1.5. The alkaline battery would therefore push more current through an equal resistive load. Something like 20% more current would man a lessened operating time before it dies.

Good information, so are all rechargeable batteries 1.2 volts?

No. Lithium batteries are 1.5v for example. Lead acid batteries are 1.5v as well.

Personally I have found that chargable batteries last longer. We use rechargeables in everything that takes a battery, and I do believe they last longer then normal batteries.

What charger you using? I still have a el cheap-o one that is slow and only charges 4 at a time.

Moe wrote: What charger you using? I still have a el cheap-o one that is slow and only charges 4 at a time.

I'm using a Duracell quick charger for mine rechargeable batteries.

Baydream wrote: Good point. Besides, if the equipment is not going to be used for an extended period, get those batteries out. A leak can kill a valuable piece of equipment.

Especially Duracells, they are leakers. I have been using the Sanyo Eneloops, they came with a charger and 4 AAs, and are great.....