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How many years does an NES cartridge battery last?

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I wish I could up-vote more than once. ;) – Lance May Jul 8 '10 at 1:52
What? You mean they are battery driven and loose all savegames when the battery dies? Oo Does that only affect the savegames or will it make the whole game unplayable? – Dave Jul 8 '10 at 10:37
@Dave: Only save games – Kip Jul 9 '10 at 12:50
Someone oughtta figure out a way to replace/recharge those, otherwise my collection is going to devalue seriously right before they become serious collectors items :-p – mechko Jul 12 '10 at 1:47
@Mechko: they've been replacing them for years: – MGOwen Sep 2 '10 at 5:31
up vote 30 down vote accepted

According to this page, the batteries last 15-20 years.

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+1 for informative link. – Christian Jul 30 '10 at 16:17
may come in handy one day – Keaanu Aug 17 '10 at 0:17
Wow. Truly impressive quality, considering 5-10 years wouldn't have hurt their sales in the slightest. – MGOwen Sep 2 '10 at 5:32

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