||Keep in mind that like most batteries, the voltage will drop gradually over the life of the battery.|
||25 mah||25 milliamp hours could typically power a red LED at medium brightness for 12 hours.
|Dimensions||26mm x 29mm
||Just a smidge over an inch square|
||That's less than 1/2 millimeter!
Add a little magic to your projects with paper thin power! You can connect Papervolt batteries to your circuit using conductive tape (or alligator clips if you're old school). These batteries are less than half a millimeter thick (.45mm to be exact). That's thin enough to embed in a greeting card without incurring extra postage. They are designed to be laminated inside smart credit cards--yes, they can survive hot lamination. Magical indeed!
At 26mm x 29mm, these little batteries are just a smidge over an inch square, small enough and flexible enough to hide in any number of projects, from a light-up Teddy Bear t-shirt to a flashy duct tape bracelet. They are 3 volt batteries with 25mah capacity. That's 25 milliamp hours, about 10% of the capacity of a 2032 coin cell battery. A single LED might draw anywhere from 2-8 milliamps. You could press a button on a circuit to light up an LED for a few seconds at a time, oh, about 1000 times. On the other hand, if you want to light up an LED continuously, it helps to think of it as the "party battery." It's not a long-haul battery like AA batteries, but it will light up an LED on a tiara for one night of Halloween trick-or-treating, or make a flower glow for the duration of your dinner party.
PaperVolt batteries are a nontoxic alternative to button batteries (also called coin cell batteries). I spent over three years searching for an alternative to button batteries after I learned that they pose a very serious hazard to children. Look at the packaging for button batteries the next time you are at a pharmacy or hardware store--you will see a warning stating that the batteries can kill a child in under two hours. Children can mistake the round shiny batteries for candy, and the 2032 batteries (about the size of a quarter) get caught near the clavicle instead of going through the digestive system. Our bodily fluids can create a short circuit that leads to acid burns that are either fatal or lead to severe damage to the vocal chords requiring many rounds of surgery. Just don't do it--unsecured coin cell batteries should never be used in circuit projects for children. The maker movement popularized the use of exposed button batteries in paper circuits and on circuit boards for classroom projects, and many educators are unaware of the risk of sending these circuits home, putting toddlers, kids with special needs, 8-year-old daredevils, and family pets at risk.
And as a bonus, Papervolt batteries are noncombustible: if you hit one with a hammer, it won't explode like some of the rechargeable lithium batteries frequently suggested for wearable projects by vendors in the maker community. Bad choice.
Let's set those gloomy scenarios aside. Instead, may I recommend a battery you can laminate into paper thin projects? A battery that will not poison children? A battery that will not start a fire? Enchant your friends and delight your kids with a Papervolt battery--so thin it's practically invisible!
These batteries contain lithium and are subject to shipping restrictions. They must be packed in a rigid box large enough for a 4" warning label on the same side of the package as the mailing address, and they have to be shipped via ground, and yada yada I won't bore you with all the details, except to say that I'm not going to go to all of that trouble to sell you a single battery. If I could throw it in with the rest of your order...but I can't. So here we are. Buy 4 @ $3 each plus $10 shipping & handling. I know, I know, not as cheap as button batteries, but SAFE! PAPER THIN! INNOVATION IN YOUR POCKET!