Button cell voltages

The place for all discussion on gaming hardware
Post Reply
User avatar
ReKleSS
Posts: 420
Joined: Sat Sep 03, 2005 1:38 am

Button cell voltages

Post by ReKleSS »

I grabbed a pile of CR2032 batteries on ebay for my DC, saturn and SNES carts. Can anyone say how low the voltage has to drop before there's a risk of the memory disappearing?
弾もまたいで通る
User avatar
RGB
Posts: 526
Joined: Sat Aug 04, 2007 3:11 pm
Location: Europe

Post by RGB »

SNES carts use various size srams (6216/64/28/256) to hold the data. From what I've learned the data should still be valid on them at a minimum power supply voltage of 2.0 volts.
Same thing applies to the DC and SAT if they use similar/same memories.
Last edited by RGB on Thu Feb 14, 2008 10:59 pm, edited 1 time in total.
User avatar
ReKleSS
Posts: 420
Joined: Sat Sep 03, 2005 1:38 am

Post by ReKleSS »

Strange, my unreliable Kirby's Super Deluxe cart was still at 2.5V. Oh well, the new battery should last for a few years.
弾もまたいで通る
User avatar
system11
Posts: 6290
Joined: Tue Jan 25, 2005 10:17 pm
Location: UK
Contact:

Post by system11 »

The voltage is not a good guide on how good a battery is. Lithium cells don't degrade gracefully, they hold their voltage pretty well for the duration, then suddenly drop out.
System11's random blog, with things - and stuff!
http://blog.system11.org
PC Engine Fan X!
Posts: 9101
Joined: Wed Jan 26, 2005 10:32 pm

Post by PC Engine Fan X! »

I can attest to inserting an official SNK branded CR-2032 button cell battery into the SNK Neo-Geo Pocket Color handheld in April of 2000 and it lasted until about April-May of 2005 before the red LED indicator told me to replace it before "immenient game memory back-up is lost". I replaced the aging SNK branded 2032 battery with a fresh one and it's been a solid performer since then... ^_~

PC Engine Fan X! ^_~
Post Reply