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Old 10-13-2012, 01:24 AM #1
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Default Battery Question

Are there rechargeable Li Ion cells that work for pen lasers? I ask because I just bought some and:

1. I want to be able to recharge my batteries.
2. If I understand correctly, Li-ion's put out more current than alkalines, which could give me more power?(please correct me if I am wrong)

Thanks,
Isaac

Sorry, don't know much about batteries.


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Old 10-13-2012, 05:20 AM #2
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Default Re: Battery Question

Most pen style lasers use AAA batteries, and I don't think the driver's like 3.6-4.2 volts instead of the regular 3.0 volts of two alkaline batteries.

If you want to use rechargeables, you should get NiMH AAA ones. However, they might not produce enough voltage (only 1.2 volts) and there are newer NiZn type batteries which are rated at 1.6 volts. But you shouldn't use li-ions though.

Cheers!
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Old 10-13-2012, 05:28 AM #3
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Default Re: Battery Question

You could use only one Li cell and a spacer in place of the second cell and you will be really close to the target voltage.

they don't necessarily put out more current but they do put out about twice the voltage.
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Old 10-13-2012, 05:32 AM #4
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Default Re: Battery Question

I use a single 10440 and a dummy cell in some of my pens just like Pyro suggested.
In my experience the Li-ion's put out more current than alkaline's at least when fully charged.

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Last edited by Moebius; 10-13-2012 at 05:35 AM.
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Old 10-13-2012, 09:51 AM #5
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Default Re: Battery Question

Yup as the others have said above...heres a link to a thread I made about cheap ebay pens and their power output. Using a single AW 10440 and a spacer, an approx 30% increase in power output was seen. The spacer was made from an iron rod and a marker pen!
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Last edited by grainde; 10-13-2012 at 09:55 AM.
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Old 10-13-2012, 03:18 PM #6
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Default Re: Battery Question

Cool, thanks everyone for the responses! I'll have to check out obtaining a 10440 battery!
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Old 10-13-2012, 03:44 PM #7
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Default Re: Battery Question

Ah, I guess LiFePO4 10440's are an option because they have 3.0-3.2 volt operating voltage.
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Old 10-20-2012, 07:19 PM #8
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Default Re: Battery Question

Yes, but the transistor eats a small voltage, so for a diode who runs @3V for example, you should have a 4.0V battery
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