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2x CR2032 battery holder with 12" of wire.
It's a nice quad-AA battery holder, with 6" leads.
If you need to charge LiPo batteries, this simple charger will do just that, and do it fast!
LR44 Alkaline Battery
This unit is great for wiring up 3 AA batteries in series.
This battery holder uses 3 AA cells to power your electronics, robotic or embedded project. You can do without, but MAN, when you need to hold 3AA cells, you'll need it!
Volume III of the Forrest Mims Engineer's Mini Notebook series includes three of his best-selling notebooks devoted to sensors: Sensor Projects; Solar Cell Projects; and Magnet Sensor Projects.
This is truly the Ultimate BrutusBot! It will do robotic front flips through the snow and keep on going!
Horns constructed from Fosshape - a heat-formable costuming fabric.
Here's a common light weight 2032 coincell battery. Great for powering tiny robots, real time clocks and LED throwies!
15 ultrabright red, yellow and white LEDs with built-in flickering circuits and assorted lens sizes from 3mm and 10mm.
This high discharge 2-cell LiPo is a great way to power any R/C, robotic, or portable project. This is an excellent choice for anything that requires a small battery with a lot of punch.
This high discharge LiPo is a great way to power any R/C, robotic, or portable project. This is an excellent choice for anything that requires a small battery with a lot of punch.
Have some low-capacity 1S LiPo cells needing a convenient charger? Simple and cheap!
LilyPad Development Board - Wearables design system
Soldering irons are great when mains power is nearby. For those times when you need to crawl under a car dash, the Hakko battery-powered version suits the need better.
Here's a different type of CR2032/CR2025/CR2016 battery holder, that has the cell clip into it from the top rather than the side.
A convenient little switch to easily turn on and off your LiPoly batteries when prototyping.
These are very slim, extremely light weight batteries based on the new Polymer Lithium Ion chemistry.
Charge and power your Pro Trinket with this LiIon/LiPoly Backpack Add-on board by Adafruit.
Add a High Capacity Rechargeable power supply to your project easily!
Our GraviTrack Marble Machine Kit is our newest addition to the Marble-Drop mechanism family.
The fun of a Marble Machine, miniaturized for your desk, now battery powered!
Simple LiPo single-cell charger from Sparkfun, with a Micro-USB cable connector.
What makes this battery special for E-textiles? Built-in current limiting for safety.
Construct your own giant squid and steam-punk submarine. Each circles the other around a kelp forest, powered by the energy-concentrating SolarEngine.
3.7V 400mAh LiPoly battery with an excellent 2C discharge rate for small projects.
The Sandwich robot is a line-following Robot. Sintra base (not included)
The Sabertooth 2X12 is one of the most versatile, efficient and easy to use dual motor drivers on the market.
The iMax B6 Balance Charger accurately balances and charges Lithium Polymer, LiFe (A123), NiCd and NiMH batteries. The B6 will balance charge LiPo/LiFe up to 6S and NiMH/NiCd up to 15S and shows individual cell voltage during charge with realtime updates throughout the charge cycle.
If you're looking for a simple way to add a battery to your LilyPad project, the LilyPad Coin Cell Battery Holder might do the trick.
Need a USB/DC method to charge your Lithium Polymer battery? This Adafruit charger is a tidy solution!
Simple cat ears constructed from Fosshape - a heat-formable costuming fabric.
A small, but very mighty power supply. This board was designed to be as small and inconspicuous as possible.
Need to add more voltage to your regular 4AA battery pack? Parallax has come up with this ingenious plug in module that adds a 5th module to your AA quad-pack holder.
Looking for a portable USB device charger, like for an iPod, Zune, or similar portable electronic device? The MintyBoost is a fun kit that lets you recharge on the fly, from a pair of normal AA cells!
Lithium polymer battery, but darn small!
Think of this as a audio robotic digestive system. It'll eat 20 whole seconds of sound before barking it back at you with beautiful clarity, maybe not exactly as you remember it but pretty close!
This 3.6V 170mAh rechargeable Ni-Cad battery contains three cells in pyramid configuration.
This 3.6V 280mAh rechargeable Ni-Cad battery contains three cells in a right triangle configuration.
It's small, fast, and very well designed line-following/maze solving robot. And a great deal!
Peggy 2 LE is a smaller size and lower cost version of the "Peggy 2" light-emitting pegboard display, that provides a quick, easy, powerful and efficient way to drive up to 625 individual 5mm LEDs.
Peggy 2 provides a quick, easy, powerful and efficient way to drive a lot of LEDs-- up to 625-- in a big matrix covering almost a square foot of area. (Note: LEDs not included)
Meggy Jr RGB is a handheld platform for developing your own pixel-scale video games.
Save $20! Peggy 2 kit, AC adapter, extra button set, and 175 each of red, green, blue, and white diffused 10mm LEDs.
Save $20! Peggy 2 kit, AC adapter, extra button set, and 640 diffused 10mm white LEDs.
Save $20! Peggy 2 kit, AC adapter, extra button set, and 640 diffused 10mm blue LEDs.
Save $20! Peggy 2 kit, AC adapter, extra button set, and 640 diffused 10mm red LEDs.
Save $20! Peggy 2 kit, AC adapter, extra button set, and 640 diffused 10mm green LEDs.
This Small 7-key 38 kHz Infrared Remote Control is great for wirelessly controlling or communicating with all kinds of electronic projects.
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Warning: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Please visit www.P65Warnings.ca.gov for more information. This item was manufactured prior to August 31, 2018.