the one that can charge a battery that came from a ups like maintenance free battery (is this the Sealed Lead Acid you mean?) and a battery of a car which need to refilled by distilled water...
hi
Look thru these links for both types of charger
How to charge sealed lead acid batteries. Custom battery chargers for OEMs in a hurry from PowerStream
Sealed Lead-Acid Battery Charger Circuit
12V Car Battery Charger | Circuit Diagram
**broken link removed**