Battery power for your smaller LED projects and crafts
Here is a battery holder with a small footprint for when you want a portable LED lighting solution or simply don't have a readily available outlet in a convenient spot. Takes a single 23A 12V alkaline battery.
Note about run time: In spite of the data in the above formula, we took a single Northstar (20mA), hooked it up on Friday morning at 11 AM, and the light was still on Tuesday morning. Of course, brightness had diminished. But this tells you that if you need to power a couple of small lights for a table decoration or accessory, this little battery pack can do the job.
How long will the battery last?First, figure out how many amps (or mA) the items you're powering draws.