[villages07]

CV,

I didn't see the letter, but, assume (and, yes, that can be dangerous) that there was some discussion of a Carbon Monoxide detector alarm going off. Never heard of this myself....just did some google'ing and found several references that indicated that hydrogen is given off (at non dangerous levels) and this can trigger a CO detector...a false alarm, so to speak.

Here's a quote from one of the postings:

The batteries in those systems are not emitting carbon monoxide when charging. The sensors in the alarms used in the complex and by the fire department are cross sensitive to hydrogen. It should be an eye opener that the fire department does not recognize nor know about the types of sensors in these Co alarms and test instruments they use. CO comes from combustion. The inexpensive alarms are cross sensitive to other gases and are not hydrogen compensated.
Bob Dwyer, Director of Training
COSA (Carbon Monoxide Safety Association)