battery I may use

bmire1985 · Post by **bmire1985** » Tue Mar 06, 2007 1:03 pm

how would this battery work
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0077594563

p.s. I am also considering using a sony psone screen instead of my casio ev-670

edit: this topic may be in the wrong forum. please move to the appropriate one if needed

shmagoogin77 · Post by **shmagoogin77** » Tue Mar 06, 2007 4:39 pm

is that lithium/?

bmire1985 · Post by **bmire1985** » Tue Mar 06, 2007 4:48 pm

yes its a lithium polymer 7.4V battery with 4000mAh with the dimensions as stated in the auction.

Kurt_ · Post by **Kurt_** » Tue Mar 06, 2007 5:09 pm

I got this one: (2 of them):

http://search.ebay.com/search/search.dl ... arch&fgtp=

2 of these in series will make a 7.4v 4000mah pack, and they're very thin, great in my portable SNESp, and side by side almost exactly match the dimensions of the SNES mini's board. These ones are from a guy who sells many auctions of these kinds, as seen in the link. They come in custom-molded packaging, and are probably straight from the factory with a worker discount, and he's reselling them at slightly higher than their value. Each auction has 6. If someone outbids you, he always posts more, and has been for at least a year.

These batteries are also less expensive than your pack.

But they're really hard to solder to. I poked a hole in the tabs and threaded some wire through it, soldered the wire, and clamped on some aluminum foil, then put electrical tape over that. It sounds crude but it works 100% and doesn't take up much more space.

I destroyed one and had to buy another one because I got it too hot and it got all squishy, like stale bread vs. fresh, damp bread.

Website · Post by **Life of Brian** » Tue Mar 06, 2007 7:51 pm

Cool find, Kurt

bmire1985 · Post by **bmire1985** » Tue Mar 06, 2007 10:07 pm

I could prolly get the batteries in my auction for like $3 more than your auction if I bought two 3.7V, but your batteries are thinner which prolly works better for a portable so I may consider those batteries.

Also how do you charge your type of battery I messed the guy for my auction today but no response yet.

bazz · Post by **bazz** » Fri Mar 09, 2007 9:31 pm

This from Kurt_ - from a pm that talks about the batteries he recommended here

Kurt_ wrote:With a litium ion charger. I got this one, and it works wonderfully.

http://www.batteryspace.com/index.asp?P ... rodID=1121

Or if you want just the guts, and to save $10, get the circuitry only, minus the case:

http://www.batteryspace.com/index.asp?P ... rodID=2396

You should also have a protection circuit. It prevents it from over-charging or under-discharging. It also stops current flow if something messes up. This thing saved my project many, many times. One time my SNES was completely shorted, and should have died, but I had the protection circuit.

http://www.batteryspace.com/index.asp?P ... tegory=967

Any of those will do. The only downside is it doesn't have a reset button, and you must short both negative leads in order to reset the circuit after a problem. Other than that it works wonderfully.

The one I got is the following two:
http://www.batteryspace.com/index.asp?P ... egory=1098

This one comes with a fuel gauge, which works wonderfully, that has 5 leds that show the battery life.

bmire1985 · Post by **bmire1985** » Fri Mar 09, 2007 9:51 pm

thanks bazz and kurt

bmire1985 · Post by **bmire1985** » Wed May 02, 2007 11:16 am

bazz wrote:This from Kurt_ - from a pm that talks about the batteries he recommended here

Kurt_ wrote:With a litium ion charger. I got this one, and it works wonderfully.

http://www.batteryspace.com/index.asp?P ... rodID=1121

Or if you want just the guts, and to save $10, get the circuitry only, minus the case:

http://www.batteryspace.com/index.asp?P ... rodID=2396

You should also have a protection circuit. It prevents it from over-charging or under-discharging. It also stops current flow if something messes up. This thing saved my project many, many times. One time my SNES was completely shorted, and should have died, but I had the protection circuit.

http://www.batteryspace.com/index.asp?P ... tegory=967

Any of those will do. The only downside is it doesn't have a reset button, and you must short both negative leads in order to reset the circuit after a problem. Other than that it works wonderfully.

The one I got is the following two:
http://www.batteryspace.com/index.asp?P ... egory=1098

This one comes with a fuel gauge, which works wonderfully, that has 5 leds that show the battery life.

when I use that charger and protection circuit with fuel guege do I have to charge both batteries at the same time if I use the following batteries
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... :IT&ih=019

EDIT: sorry for bring back and old post I meant to send a pm with a quote and made a mistake