SLA's do not charge at the same rate they can discharge at. Here's a good article on the subject:
http://batteryuniversity.com/learn/article/charging_the_lead_acid_battery Steve On Mar 25, 10:59 am, neroc <[email protected]> wrote: > Thanks for the reply , > All my batteries are SLA . > I have solved this now , one of the batteries was duff, > I chose a 2 amp charger because I`ve been told charging at higher > currents can harm SLA . > > this I dont understand:-"I have a 24v 6a smart charger and it takes > 12 > hours or more to fully charge two 18ah batteries wired in series." > > Steve ,Why 12 hours ? why not 3 hours ? > > Neil R > > On Mar 25, 1:25 pm, Steve Tyng <[email protected]> wrote: > > > Do the batteries charge individually OK from a 12v charger? If so, > > I'd suspect your 24v charger. Also, 2 amps isn't much. Have you left > > the batteries on charge over night to see what you get? I have a 24v > > 6a smart charger and it takes 12 hours or more to fully charge two > > 18ah batteries wired in series. > > > Steve Tyng > > > On Mar 24, 4:05 pm, neroc <[email protected]> wrote: > > > > Im looking for information on 24v batteries, I have a 24v 2 amp > > > charger but it doesnt seem to want to charge 2x12v lead acid > > > together . does anybody know why ? do I need to buy 24v lead acid ? > > > > Neil R > > -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat
