Hi

I am wanting to know how I can rig up a simple trickle charge for 4 x AAA Ni-MH Rechargeable Batteries .I need them to run a 5 volt laser for a security set up I am making .

cheers

spike

 

Do you want to charge them single or all together in series?

 

Hi Dodgydave

Thanks for your reply , I want to charge them together .

cheers

spike

 

So you can use a 12v supply constant current put them all in series, or individual, plenty of circuits on google,

http://www.diyelectronicsprojects.com/2013/02/switchless-nicd-nimh-battery-charger-circuit-diagram.html?m=1

 

Hi,

Low current is the key to longer life. Maybe C/40 or so. They dont put up with overcharging as well as NiCd.