I have been having issues about recharging my 12v 5ah SLA battery. I didn't want to overcharge and ruin it , but plugging it in for the recommended time wasn't working. I found a more powerful wall wart (rated at 1 amp) that does the job and a website that gives precise values for how charged your battery is. See Battery metering and look at the table about half way down. You need a digital multimeter to check the voltage, but it seems to be good info.

RainmanP, have you thought more about the white LED lights? I'm looking for something in a white "running" light, more to be seen that to use to see the road.