A "wall transformer" sounds like one of those horrible little things with terrible load regulation and no line regulation. What you need is a (well regulated) fixed potential per cell, with current limiting for safety. Can't remember the potential required per cell (something like 2.3V), but you should be able to find the number (suitable range) easily enough. Lead-acid cells normally self-regulate the actual charging current, depending on their state of charge, and provided the applied potential is OK.
Joe. > -----Original Message----- > From: Jeremy N. E. Proffitt [SMTP:[EMAIL PROTECTED]] > Sent: Wednesday, December 04, 2002 10:33 AM > To: Multiple recipients of list CHIPDIR-L > Subject: charging sealed lead acid batteries > > I would like to replace a pair of 6v lantern batteries in a lantern with a > sealed lead acid or gel cell battery and would like to know about charging > them. I figure I can apply 12.5-13.5 volts DC though a wall transformer, > do I need to add a current limiting resister or have I got this all wrong? > > Thanks > Jeremy -- Author: da Silva, Joe INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
