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Lithium batteries?! - Page 2

post #16 of 27
11/1/05 at 1:06am
in the US, seems like the cheapest (w/shipping) is here ...methinks i'll pick a few up for me new hornet!
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post #17 of 27
11/1/05 at 1:17am
Quote:
Originally Posted by kugino
in the US, seems like the cheapest (w/shipping) is here ...methinks i'll pick a few up for me new hornet!
Hmmm, now I'm reconsidering. With shipping charges, I think it would be cheaper to just get alkalines on sale locally with 50% the MaH of the Lithiums. Or at least, not any more expensive.
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post #18 of 27
11/1/05 at 5:32pm
How much longer do these last compared to alkalines? I am not talking about the shelf-life.
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post #19 of 27
11/1/05 at 6:59pm
Quote:
Originally Posted by Czilla9000
How much longer do these last compared to alkalines? I am not talking about the shelf-life.
ray samuels quotes the following using the hornet:
Quote:
Using 250ma 9 volts rechargable battery from "I power US" the Hornet will charge it in less than 2 hours & will last 13-14 hours using the HD600 at very load play back. If Alkaline Duracell "Ultra" is used you get around 45 hours, using the HD600. If LITHIUM 9 volts battry is used, @ $5.80 from "Mouser Electronic", you will get over 120 hours of music using the HD600.
assuming these numbers are consistent with other sources, maybe 2-3 times the longevity of alkalines.
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post #20 of 27
11/1/05 at 7:09pm
The biggest advantage to lithiums is the discharge curve. The voltage doesn't drop off until JUST before the battery dies...
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post #21 of 27
11/1/05 at 8:11pm
Yep, lithium 9V are the way to go. You've gotta love that discharge curve - you get consistent sound quality through over 90% of the battery's discharge life.

I used them in my Headroom Micro w/Desktop Module. I never tested to see how long they ran though, but it say it would get over 20 hours.
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post #22 of 27
11/4/05 at 11:54pm
BTW, here's the best price I've found:

http://www.thomas-distributing.com/9...ies-9-volt.htm

Choose the discount shipping option (USA mainland only) and shipping is only $3.99. I purchased two for my go-vibe, for a total of $13.93.
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post #23 of 27
11/5/05 at 1:13am
Nice find, fewth, shipping is reasonable enough, that i think i will try a few myself.
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post #24 of 27
11/5/05 at 1:46am
Another type of battery to consider are cheap cell phone batteries and NiMH rechargeables. In the long run, it's a lot cheaper since when the battery is drained, you just recharge it and use it again. It's also good for the environment. (Just think: For every 1000 disposable batteries trashed, only one rechargeable will need to be trashed assuming same usage.)
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post #25 of 27
11/5/05 at 3:20am
Quote:
Originally Posted by star882
Another type of battery to consider are cheap cell phone batteries and NiMH rechargeables. In the long run, it's a lot cheaper since when the battery is drained, you just recharge it and use it again. It's also good for the environment. (Just think: For every 1000 disposable batteries trashed, only one rechargeable will need to be trashed assuming same usage.)
Yep, NiMH batteries are great. I'm not a big fan of them in their 9v iteration, though. Lifespan is too short, charge times can be long, and it can be hard to find the right charger for a particular brand of battery. I've got two Plainview 9.6v and an Energizer Accu 7.2v, and my Rayovac charger won't charge either of them.
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post #26 of 27
11/5/05 at 4:53am
Quote:
Originally Posted by star882
Another type of battery to consider are cheap cell phone batteries and NiMH rechargeables. In the long run, it's a lot cheaper since when the battery is drained, you just recharge it and use it again. It's also good for the environment. (Just think: For every 1000 disposable batteries trashed, only one rechargeable will need to be trashed assuming same usage.)
One rechargable to 1000 alkalines is a skewed number, but 100 for sure.

1. Typically, for AA and AAA, a good NIMH will get 70% or so the life of a good alkaline, for a device that needs 1v+.

2. While it varies by cell and environment, even with a good charger, most batteries will start to really lose their capacity around 150-300 charge cycles. The 1000 number is not based on full discharges, or keeping the rated capacity.

3. You have to be way too anal to use them at 1:1 with alkalines (you can NOT keep an alkaline spare, because you can get AAA and AA everywhere). Keeping a charged spare for every one in use on your person makes it a lot easier. I decided to do it this way, and have had no problems.

One suggestion I have for others, that has made it much easier for me, is to mark the batteries for unique identification. FI, I set aside two for my DAP, labeled 'I5-sub-I' and 'I5-sub-II', and one is always in the player. It removes the need to use a battery tester or keep records, and not having to use either allows NIMH to be very convinient.

4. It's not that hard to physically damage NIMH batteries.

It's still cheaper in the long run, especially with several new $20 smart chargers (Duracell, Energizer, and Kodak have retail ones, now), but it's not 1000:1 by a good margin.

Lastly, Sanyo has some new batteries with higher capacity and very low discharge rates that they will start moving out next year that are quite promising.
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post #27 of 27
11/5/05 at 7:58am
Heh, weird... I just tried a Plainview 9.6v in my Rayovac charger again, and instead of the usual blinking error LED it seems to be charging OK. Go figure, right after I order a couple lithium cells. Ain't that the way life always goes?

Well, I'll use the lithiums until they're dead then, and the Plainview after that. Or the other way around, given the shelf life of lithium batteries.

Edit -- 40 min later and the Plainview is nice & warm, and still charging. Probably won't hit its rated capacity of 9.6v with this charger, but as long as it holds a reasonably full charge...
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