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Old 03-20-2014, 09:33 PM #1
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Default 9V battery charger?

Hey all,
I know that 9V batteries are not very useable for powering lasers, but I'm looking for a good quality 9V battery charger.

I've seen the 40$ giant bucket thing that energizer sells, and that seems very excessive. Anyone know of a good brand to buy this from?

Thank you!


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Old 03-20-2014, 10:37 PM #2
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Default Re: 9V battery charger?

9V cells are primary batteries which means they are not designed to be recharged. If you have a constant voltage and constant current variable bench DC supply you can set the current low (~50mA) and charge them up to 8.85V or so a few times if you keep an eye on them but the capacity drops by about half each time you charge them. It isn't a viable means of reuse, especially not for high drain loads like lasers. You're lucky if you can get 40mAh out of the first charge.
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Old 03-20-2014, 11:02 PM #3
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Default Re: 9V battery charger?

You could get something like this.
CH-V228 Compact 9v Charger + 2 pcs 9V NiMH 200mAh Retangular Battery
Or this
http://www.batteryspace.com/ch-p228c...arbattery.aspx


I have this one Li-ion based and 500mAh. They are great but they say out of stock..
Two Li-Ion 9V 500mAh (4.5Wh each) Rechargeable Battery+ 0.3A Smart Charger (9V Snap-on connector)

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Old 03-27-2014, 03:09 AM #4
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Default Re: 9V battery charger?

Thanks for the replies!
Sigurthr, what do you mean that I won't be able to recharge them?
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Old 03-27-2014, 03:33 AM #5
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Default Re: 9V battery charger?

Standard "9volt" batteries are alkaline batteries which are not rechargeable.
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Old 03-27-2014, 03:35 AM #6
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Default Re: 9V battery charger?

Right, I should have specified that I was talking about rechargeable Ni-MH batteries.
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Old 03-27-2014, 05:42 PM #7
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Default Re: 9V battery charger?

Yeah you can get rechargeable PP3s.

I went onto Amazon and looked this up, I have the same thing over here in the UK: Amazon.com: Lloytron- Compact Aa/aaa + Pp3 Battery Charger B1502: Electronics

But why on EARTH are these so expensive in the US? Every charger I found on the page was around $50 or more, which is ludicrously expensive compared to what we can get them for here.
Amazon.com: lloytron charger
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Old 03-28-2014, 03:27 AM #8
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Default Re: 9V battery charger?

Quote:
Originally Posted by trencheel303 View Post
Yeah you can get rechargeable PP3s.

I went onto Amazon and looked this up, I have the same thing over here in the UK: Amazon.com: Lloytron- Compact Aa/aaa + Pp3 Battery Charger B1502: Electronics

But why on EARTH are these so expensive in the US? Every charger I found on the page was around $50 or more, which is ludicrously expensive compared to what we can get them for here.
Amazon.com: lloytron charger
From what I can tell, they're probably made for the European market. Unless someone needs one to plug into a European style plug, they won't sell that well.
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Old 03-28-2014, 07:10 PM #9
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Default Re: 9V battery charger?

Quote:
Originally Posted by Bionic-Badger View Post
From what I can tell, they're probably made for the European market. Unless someone needs one to plug into a European style plug, they won't sell that well.
of course... sorry. I had a complete idiot moment there
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