Originally Posted by n4zou

Open up this light and you will find a 4 Amp Hour 6-volt SLA battery and 6-volt 50-watt halogen bulb. Be very careful you don’t touch the bulbs glass envelope. If you do use alcohol to clean it, as it will quickly burn out. Drop by a big box retailer's automotive supply department and purchase a pair of small halogen driving lights. That 6-volt bulb from the spotlight will fit perfectly. The driving lights typically cost $14.95 and $19.95 for a pair. The very small driving lights will be easy to mount on your handlebar using an EMT conduit hanger from the electrical supply area of any building supply store. They also wont look odd at all on your bike. As for recharging the battery, just find an old wall wart transformer that powered some now defunct gizmo with a rating of 6-volts DC and something around 500 mA. Make sure you connect the positive lead of the transformer to the positive lead of the battery! It will normally take over 8 hours to recharge the battery and you can leave it connected all the time as 500 mA is considered a trickle charge and it's impossible to over charge the battery.