Thanks Marvin for restating my point. - Mike
From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Marvin Munster Sent: Wednesday, December 02, 2009 3:39 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] battery Hi Guys, Why not use AGM batteries and reduce the explosion problems. They can be mounted in any position and do not have need for water filling or venting applications, however I would recommend they not be sealed in a box and have some slight venting. There is some good battery information at: http://www.impulseelectronics.com/batteries_tech.htm and http://www.impulseelectronics.com/batteries2.htm. Marvin - W6MJM At 12:22 PM 12/2/2009, you wrote: Tom, Please be advised that boating laws do not specifically require a battery to be in a box. What they do require is a battery to be securely mounted and the "non-grounded" terminal covered. Most folks interpret that as a battery box or bracket to old the battery in place. Most folks usually cover both battery terminals, as interpretation of the terminal issue varies state to state and officer to officer. Battery boxes as used in boating are generally vented, by the cable entrance-ways and some even have a small open vent on the top. If a battery is placed in an enclosed compartment, it is generally vented externally or via another compartment. I do not recall the precise position of the ABYC on battery ventilation, but I know they require the battery not be mounted under any electronic or electrical equipment for the sake of corrosion. In the past, I have used marine type battery boxes for radio installations and I usually vented it outside by cutting a hole in the battery box top and affixing a flexible vent line to the outside. I have experienced no complications following this procedure, either with corrosion or explosive events. Good Luck, Rich N9EMS __________ Information from ESET NOD32 Antivirus, version of virus signature database 4663 (20091205) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com
