View Full Version : how to charge a battery using a SMPS????

01-22-2010, 08:57 PM
I have got a SMPS supplying 12v dc.....
the battery charger also supplies 12v dc,so is it possible to charge a battery( LEAD ACID-12V) using a SMPS??

if possible......then how can we charge ????

01-23-2010, 08:43 PM
go through

01-25-2010, 12:04 PM
i have 12 V 7AH sealed lead acid batteries that i bought 1 year earlier. now the batteries are giving outputs as low as 5 volts. moreover people sell those chargers with transformers in them at 300-350Rs but i feel like they are cheating. I used to charge the batteries using them but their conditon still detoriated.Please help me to recover the batteries i dont have much money to buy new ones.
Also suggest me the best charger that i can buy for these batteries?I need help for my batteries urgently or else testing of my robots wont start.

01-28-2010, 12:57 PM
Here is a simple circuit


change the R1 and R2 to make the output 12V use the calculator :

I feel that the battery is dieing, better use a good battery original SUNCA ... (u need experiance to find real one) ... exide may have better ones in automobile
shop.. if u use in table light etc . better go for Nicd battery .. made by eveready (make a pack )...

01-28-2010, 09:18 PM
See this