Yes. Simulation of that circuit shows the final output voltage (battery fully charged) would be 14.35V, which is higher than the recommended 13.8V for an SLA battery. Also, the current-limiting limits the current at ~840mA, which is too high for the 200mA transformer you have. Something is likely to cook.but my first circuit in this Thread seems to be not automatic charger , so if i leave it permanently with battery , is it possible to be dangerous or reduce my battery life ?
Here's the sim result (ignore the horizontal time scale):
I suggest you make R1=3.3Ω to reduce the charging current limit to ~200mA, and replace R3 with a 1.8k resistor in series with a 500Ω trimmer configured as a rheostat, to enable critical adjustment of the final full-charge voltage.
You're not the only one! Posts 13 and 19 are inconsistent regarding the battery Ah rating and the transformer current rating.i'm really confused