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   Home :: Community :: Surveys :: Do you use rechargeable batteries in your calculator?
Results
Choice Votes   Percent
Yes 72 32.7%   
No 137 62.3%   
Batteries can be rechargeable? 11 5.0%   

Survey posted 2006-01-11 05:23 by Jon.

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Re: Do you use rechargeable batteries in your calculator?
burntfuse  Account Info
(Web Page)

I know I should, but my calc's batteries just don't need replacing that often (maybe every 4-6 months), rechargable batteries and a charger are sort of expensive, and I'm not sure how to discharge them fully to avoid that "memory effect" (I use rechargable NiMh AA's in my camera, and I try to recharge them only when it won't turn on, but the lifetime still seems to be getting shorter).

Reply to this comment    12 January 2006, 19:05 GMT


Re: Re: Do you use rechargeable batteries in your calculator?
Travis Evans Account Info

Memory effect doesn't seem to really be a concern anymore. The batteries seem to work okay even if you charge them before being completely ran down. But I've read that it is a good idea to completely discharge them then give them a full recharge every few months or so.

One problem that can happen is when you use a cheap charger that uses a timer instead of actually detecting when the batteries are done charging. If you charge the batteries without being completely ran down, timer-based chargers can overcharge the batteries and ruin them quickly. They also seem to not charge the batteries anywhere near full capacity, so you don't get your money's worth of runtime.

Reply to this comment    12 January 2006, 19:45 GMT


Re: Re: Re: Do you use rechargeable batteries in your calculator?
tdavis07  Account Info
(Web Page)

NiMH and Li-ION rechargables have no memory, where the old NiCd do. Most rechargables are NiMH nowadays.

Reply to this comment    12 January 2006, 21:48 GMT


Re: Re: Re: Re: Do you use rechargeable batteries in your calculator?
Matt M Account Info

actually, that is a myth. when they are getting recharged/discharged a small amount for thousands of cycles, a effect may develop but this is very hard to replicate, even in a lab. It is more of a problem with equipment in space, as these charge and discharge with solar panels for thousands and thousands of cycles infinantely.

it doesn't really matter, even on Ni-Cads

Reply to this comment    12 January 2006, 22:40 GMT


Re: Re: Re: Re: Re: Do you use rechargeable batteries in your calculator?
Matt M Account Info
(Web Page)

reference: section 2, paragraph 2, line 1

http:// www.repairfaq.org/ELE/F_NiCd_Memory.html

Reply to this comment    12 January 2006, 22:43 GMT

Re: Do you use rechargeable batteries in your calculator?
something1990 Account Info

I'm one of the old-fashioned people that still use non-rechargables and still codes on paper.

Reply to this comment    13 January 2006, 23:08 GMT

Re: Do you use rechargeable batteries in your calculator?
JcN  Account Info
(Web Page)

TI should create a custom rechargable Li-ion power cell tailored specifically to the TI line.

Reply to this comment    14 January 2006, 00:27 GMT


Re: Re: Do you use rechargeable batteries in your calculator?
something1990 Account Info

Just like Nintendo did for their GBA SP... But we would have to buy a new calculator.

Reply to this comment    14 January 2006, 20:50 GMT


Re: Re: Re: Do you use rechargeable batteries in your calculator?
jesse frey  Account Info

no just replace the batteries and battery door whith a Li-ion pack

Reply to this comment    15 January 2006, 22:07 GMT

Re: Do you use rechargeable batteries in your calculator?
something1990 Account Info

I saw on the Science Channel this solar powered recharger. They even have a portable one that you can stick on your car's window. Does anyone use that kind of charger?

Reply to this comment    14 January 2006, 20:52 GMT

Re: Do you use rechargeable batteries in your calculator?
angus  Account Info

This is what I have my spare ATX power supply for.

Reply to this comment    16 January 2006, 02:38 GMT

Re: Re: Do you use rechargeable batteries in your calculator?
Chris Williams  Account Info

Hmm, I never thought of using an old computer power supply for a calculator before. That's a good idea! I should make something that plugs into the calculator in place of batteries.

Reply to this comment    17 January 2006, 00:28 GMT


Re: Re: Do you use rechargeable batteries in your calculator?
lifeiscalc Account Info

I use computer power supplies fr everything, they are cheeper than voltage reducers. I use one of them for charging my calculator

Reply to this comment    17 January 2006, 01:13 GMT

Re: Do you use rechargeable batteries in your calculator?
Snave2000  Account Info

How depressing...non-rechargable battery users outnumber recharchables users 2-1 (of course, with such a small sample size, it's hard to draw any meaningful generalizations)...

Reply to this comment    17 January 2006, 16:39 GMT


Re: Re: Do you use rechargeable batteries in your calculator?
kirb  Account Info
(Web Page)

I get my batteries for free, so I just use what comes. I'd use rechargables in the other case, but disposables are better on life anyway (in my experience).

Reply to this comment    18 January 2006, 01:40 GMT

Re: Do you use rechargeable batteries in your calculator?
TehBlueBlur Account Info

I use NiMH. I don't have a problem with having to replace them too often, and when they get low, I dig out the spares, and you need spares weather or not the batteries are rechargeable. So why not? Besides, with two sets of rechargeables, if you keep both charged and know where you keep them, you never have to go battery hunting.

Reply to this comment    19 January 2006, 01:07 GMT
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