I’ve got a ton of battery tools. Many sit around for weeks or months before they’re needed on a job site. The last thing I want when I need a tool is a dead or weak battery. The second-to-last thing I want is to have 10 chargers drawing current all day and all night. The smart thing would be to plug in my bank of chargers the night before I need them, but remembering to do things is not one of my strong points.
Now I automate my recharging tasks to keep batteries topped off and ready for service using a seven-day programmable timer. I set it to operate for a 30-minute period once a week when I’m not burning through batteries on a daily basis. The timer uses about 0.05 kwh per week, which is way better than the 0.5 kwh per week consumed by the 24-hour timer I used in my first version of this charging station.
As shown in the drawing above, I plug a series of chargers into a power strip that plugs into the timer. Just make sure to get a grounded version that can handle the total amp draw of the chargers you intend to connect to it.
Mike Guertin, East Greenwich, RI