Posts Tagged ‘battery’
Battery Adapter
September 1st, 2011
Searching for Battery Adapter? You"re in luck. This page was made especially to help you find it! It features many different sources to get or learn about them, so be sure to scroll down the page all the way.
First, let"s start by searching Ebay for Battery Adapter:
 Battery ChargerAdapter For Nikon CoolPix S3000 S4000  US $5.47
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 YASHICA ELECTRO 35 BATTERY ADAPTER US $9.95
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Question: Can I Charge 2 AA batteries with my battery charger (with a car adapter) connected to a 12v 2AH battery?
If I connect my AA battery charger (with car adapter) holding two drained 2600mah AA batteries to a fully charged 12v 2AH Sealed Lead Acid (SLA) battery, will it completely charge them? Do I need a bigger SLA? 7AH perhaps? Is there some formula? Where can I find these formulas?
Answer: 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.
Another excellent place to find Battery Adapter is on Amazon... They have way more than just books!
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Question: Gateway laptop switches on and off from ac adapter to battery when connected, but not when computer is off?
Is it my AC adapter or battery ? When laptop is off and AC is connected the battery charges fine (light shows it is charging correctly). I am afraid to take out the battery and use only the adapter since it turns off and on repeatedly. The battery is in fact old and have not replaced yet but if this is common with adapters or batteries, which one is it?
Answer: An educated guess: there is a problem with the cord (frayed or shorted wire near where the cord plugs into laptop) When you aren't using your laptop, you aren't moving anything. The battery is probably fine as is the charger, but the cord is shorting out.
source: it happened to me more than once, cords you had to wiggle around to make it work.
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Battery Charger Toshiba
August 22nd, 2011
Searching for Battery Charger Toshiba? Perfect. This page was fabricated just now in order to help you find Battery Charger Toshiba! It will display lots of different sources to get them, so be sure to scroll down to the bottom of the page in your search.
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Question: Does Circuit City or any electronic store sell laptop battery and/or laptop battery charger.
I have a Toshiba a105-s4254 laptop and I got it just over a year ago. I got it at circuit city and I need to replace the main battery and battery charger. Does anyone know if circuit city sells the battery and battery chargers? Or do I have to order from toshiba directly. At the time of purchase I also purchased a 5 year warranty. Does anyone also know if this covers the battery and charger? Help would be appreciated. Thanks.
Answer: Well batteries naturally deteriorate over a few hundred to a couple of thousand charge cycles (charge and drain=1 cycle) so the battery definitely would not be covered under any warranty. Why are you having to replace the charger? It is only covered under warranty if it is a manufacturer's defect. If your dog ate the cable, you're SOL and need to search for a one yourself.
I don't think that Circuit City carries laptop batteries. You usually need to look at a special battery store, or the manufacturer for this type of thing. Below is a site that sells both batteries and the power adapters for your laptop.
http://www.apexbattery.com/laptop-batteries--adapters--chargers-toshiba-laptops-toshiba-satellite-a105-s4254-laptop.html
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Question: Where can I buy a replacement battery connector into the charger for my toshiba laptop?Answer: Visit this site www.maplin.co.uk they will be able to help. I also need this replacement and was able to buy from their store in a reasonable price.
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