In message <EE051D0C369E478BAFB034FB9F7DC9A0@userdc51bee4b6>, cllow2020 
<cllow2020@gmail.com> writes
>I've made one of this and works (but some components value need change)
>
>http://www.talkingelectronics.com/projects/BatteryCharger-12vSLA/Battery
>Charger-12vSLA.html
>
The 'standard' LM317 circuit works just fine and is easy to add 
temperature compensation to if you really feel the need (I live in the 
UK, for the number of times ambient is over 25c I can save the cost of a 
few 1n4148 diodes). Google for lm317 sla charger.
-- 
Clint Sharp
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