PV Gap

Doris Said:

I have Sony Cybershot digital camera. I got it with Sony battery charger and rechargeable batteries.?

We Answered:

As long as they are the same size, voltage and chemistry, they'll work just fine. Duracell and Energizer are industry leaders. You've made a good choice.

Ida Said:

Can I Charge 2 AA batteries with my battery charger (with a car adapter) connected to a 12v 2AH battery?

We Answered:

2 Amp-hr means you can discharge at a rate of 2 amps for a maximum of 1 hour. Or 1 amp for 2 hours, or 1/2 amp for 4 hours.

Now your 2600mah are 2.6 amp-hrs each, so you need 5.2 amp-hours to charge them. Which seems like more than the 2 amp-hrs your lead-acid battery has.

But amp-hrs are a strange unit, used only for batteries, for advertising reasons. The actual unit should be watt hours, which is a unit of energy. You can get watt-hours by multiplying by the battery voltage.

So the lead acid battery holds 2 amp-hr x 12 = 24 watt-hrs.

The AA batteries of 2.6 amp-hrs are actually 2.6 x 1.2 = 3.1 watt-hrs

So now it looks better, 24 watt-hr battery to charge 2 - 3.1 watt-hr batteries (total 6.2 watt-hr).

And you would be fine, except for inefficiencies in the system. Specially in the charger, which may only be 50% efficient. The charge-discharge cycle of batteries is 80% at best.

So we actually have 24 x .5 x .8 = 9.6 watt-hrs. But still higher than 6.2, but not by a lot. Given the uncertainties like efficiencies, I'd try it first.

Ronald Said:

Charging two car Batteries togather with one charger, would Parallel Conections work?

We Answered:

sure,,,,,,,,,,a pararell connection is still a 12 volt hookup.
Auto shops hook a couple of batteries up to a charger all the time.

Jay Said:

Can I use Duracell rechargeable batteries in an Energizer charger?

We Answered:

If they're NiMH batteries, yes. If some other type (like rechargeable alkalines, or NiCd) then no. The brand name doesn't matter, the underlying battery chemistry does.

Dwight Said:

Which is the best battery charger that recharges AA NiMH batteries individually in any amount?

We Answered:

The best for a reasonable about of money is the La Crosse BC-700 Battery Charger. $32.20 with free shipping at buy.com.

It can charge each cell individually can automatically discharge/charge them. It can also cycle discharge/charge batteries so you can tell if a battery has deteriorated.

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Danielle Said:

How can i charge my rechargeable batteries without a charger?

We Answered:

you can go out and buy what is called a usb battery charger you put your rechargable battery fits inside and you just plug it in to your usb connector on your computer. some on the digital cameras can charge off of a power outlet on there own also