Stupid battery question

sevast · Post by **sevast** » Sun Nov 12, 2006 10:52 pm

I like to replace my batteries but it's a pain to take off a battery and then solder on new one. Can I just add a second battery in a paralllel circuit or would that give it too much juice?

Post by **Memblers** » Sun Nov 12, 2006 11:47 pm

I believe the voltage would remain the same, but it would draw current from both batteries (and only what it needs). I think it'd be ok, but don't blame me if something gets fried.

It's only 2 pins, shouldn't be too hard to remove I'd imagine. Just add some fresh solder to it if it's not melting properly.

Bregalad · Post by **Bregalad** » Mon Nov 13, 2006 10:04 am

I'd recommand you to buy a battery with pins pre-fixed. You can find batteries almost like the original ones in the market. Solder a battery as is is just impossible.

sevast · Post by **sevast** » Mon Nov 13, 2006 11:00 am

Yeah, I know I can just cut the tabs on the old battery and it really doesn't take extra time. I just wondered if it would cause trouble. I'll let you all know if my house burns down!

Yeah Bregalad, I am buying them with the pins since I'm somewhat scared that I'll blow a lithium battery by applying too much heat. That way I can use a couple of clips to dissipate heat.

If I can add a second battery, I figure I can just add it to the back of the circuit board and be as lazy as possible!

Bregalad · Post by **Bregalad** » Mon Nov 13, 2006 11:16 am

I definitely don't recoomand that. I cannot guarantee that your house will explode or anything, but current will continue to be drawn from the old battery and that is bad. It is actually easier to just replace it. As you mentionned, it's not a good idea to solver stuff direcly on a raw battery. I tried, and while I didn't do any damage to the cart, me or whathever, I just had to waste that battery and buy one with pins.
Just disolver your old battery and place a new one with pins wich are similar to the circuit. Don't forget to recycle your old battery, and you're done.

Post by **Memblers** » Mon Nov 13, 2006 8:15 pm

I suppose it's worth mentioning (as you probably know anyways) that what would be bad in the long run, is when the old battery eventually starts leaking. Won't happen soon hopefully, but it would ruin the board and possibly the new battery too.

Quietust · Post by **Quietust** » Mon Nov 13, 2006 8:19 pm

Also, just a minor note for the record, the word is "solder" (pronounced "sod-er"), not "solver". It's just been bugging me for a little while.

sevast · Post by **sevast** » Sun Nov 19, 2006 12:44 am

ok, I'll make sure to replace the battery. Thanks for the help!

I'm not finding the ones with tabs for much under a $1.50 a battery + shipping. If you buy them in bulk, the ones without tabs are much cheaper. Does anyone know where to get ones with tabs that are the right specs for cheaper? If I can find a good price, I'll probably even buy 50 at once.

Bregalad · Post by **Bregalad** » Sun Nov 19, 2006 1:46 am

Well, I got one for the equivalent of $5 with shipping, so don't complain. Make sure you find one that can easily be soldered on a NES board, the price is less important, I think.

Post by **Memblers** » Sun Nov 19, 2006 3:32 am

I saw some in the Mouser catalog, I forget the exact price but they were closer to $1, which was cheaper than the tabbed ones Digikey had. They have different tab spacings too, I'm not for sure which one fits NES boards.

sevast · Post by **sevast** » Mon Nov 20, 2006 12:59 am

I just have a ruler and it looks like the holes on the nes board are about 18mm to me. There do seem to be batteries with a 17.8mm distance at mouser but the tabs aren't the right type. I'll let you all know if I find anything.

albailey · Post by **albailey** » Mon Nov 20, 2006 11:59 am

Has anyone here tried using a coin cell battery holder?
If so, which one? Any gotchas (like height)?

Al

sevast · Post by **sevast** » Wed Nov 22, 2006 11:26 am

There are complications. There are ones that are too tall, but the real issue is the distance between the tabs. Maybe someone can give a more accurate measurement, but it seems like about 18mm between the tabs. I haven't found a battery holder that fits right without bending the pins.

Bregalad · Post by **Bregalad** » Wed Nov 22, 2006 11:43 am

Well, I did. Actually I had a battery holder with 2 pins on a side like this. I just cut one of them and I get the ideal distance !

Code: Select all

	     b
	     +
a-------+
	     +
	     c

Here, A, B and C are the 3 pins (B and C connected together). When cutting pin C, I got the exact right distance between A and B to solder on a NES board. Don't know if I were just lucky tough.

calvinthedestroyer · Post by **calvinthedestroyer** » Fri Jul 27, 2007 3:14 pm

as far as having 2 battery's in parallel, if one battery is failing it might draw more current.
Having 2 rechargeable battery's that do not have the same charge time could have an over charging effect on the faster charging battery.
If one battery does not charge to a full +5V it will cause a voltage drop from the good battery.

Its best to replace the battery, or have some one replace it for you.

Your games are worth more than a $5 battery

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Stupid battery question

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