Last week my G bit the big one... All of the sudden it wouldn't take a charge. It was working perfectly until the morning that it was dead. I assumed the problem was mechanical. But replacing the battery seems to have fixed it. The old battery had about 13 months of service (daily charging) on it.

Are there any chemists out there who can explain this? Do G1000 batteries tend to fail catastrophically instead of incrementally?

It seems odd.

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There is a "safety switch" for lack of a better term, inside the battery. It's supposed to keep it from shorting and perhaps exploding. That could be the problem.

Worse, I don't think that there is any way to reset it.

While I have not had a failure with a g1000 battery, I have had Lithium Ion batteries fail for other devices. All of these failures have been an immediate "dead" battery. (My primary Dell laptop battery did this just two weeks ago.)

It is my understanding that Lithium Ion batteries have a very sophisticated charging circuit because overcharging will cause an explosion and possible fire. The result is that if anything gets slightly out of whack, the charging circuit shuts the battery down for safety reason.

On the other hand, the lithium batteries clearly out perform the previous technology, so they are definitely worth the risk.

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George Erhart