Great for checking levels of 3.7V Lithium cells. This is essentially a visual/graphical voltmeter, and allows you to keep tabs on energy usage, and to keep an accurate schedule for when to replace your lithium batteries.
You don’t think recycling is cool? Get a look at this, we’re sure you’ll change your mind!
NEW 2016 DESIGN! This hip red tee features Pi to 1000 decimal places on an ultra soft 100% cotton shirt.
Ever wonder how to survive in the wilderness? These cards can help!
Working model representing the sun, earth, and moon and their relationships.
A beautiful desk or bookshelf accessory for the reading fanatic in your family!
This ultimate chemistry set features 250 mind-boggling experiments!