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These are very slim, extremely light weight batteries based on Lithium Ion chemistry. Each cell outputs a nominal 3.7V at 100…
This is a very small, extremely lightweight battery based on Lithium Ion chemistry, with the highest energy density currently…
The SparkFun Variable Load is a quick to assemble kit that has been designed to allow users to draw a specific amount of curr…
If you need to charge LiPo batteries, this simple charger will do just that, and do it fast! The SparkFun LiPo Charger Basic …
These are very slim, extremely light weight batteries based on Lithium Ion chemistry. Each cell outputs a nominal 3.7V at 200…
CR2032 Lithium metal 3V 250mAh button cell battery. Great for powering low power processors or blink an LED for weeks at a ti…
No, these aren't some sort of weird, AA battery, this is actually a 18650 Lithium Ion Cell. These round high capacity cells h…
These are very slim, extremely light weight batteries based on Lithium Ion chemistry. Each cell outputs a nominal 3.7V at 850…
A solid state relay (SSR) allows you to control high-curent AC loads from lower voltage DC control circuitry. Solid state rel…
The SparkFun Battery Babysitter is an all-in-one single-cell Lithium Polymer (LiPo) battery manager. It’s half battery char…
This is a unique two-cell AA battery holder built specifically for the [BBC micro:bit](https://www.sparkfun.com/products/1420…
This is the Sunny Buddy, a maximum power point tracking (MPPT) solar charger for single-cell LiPo batteries. This MPPT solar …
This is a very small, extremely light weight battery based on Lithium Ion chemistry. This is the highest energy density curre…
This is an extremely tiny and light weight battery based on the new Polymer Lithium Ion chemistry. This is the highest energy…
This is a high-quality switching 'wall wart' AC to DC 5.1V 2,500mA USB Micro-B wall power supply manufactured specifically fo…
If you need some juice, this 6Ah Lithium Ion Battery is for you. These are very compact batteries based on Lithium Ion chemis…
The SparkFun 5V/1A LiPo Charger/Booster is a no-nonsense circuit for generating one amp from a Lithium Polymer battery at 5V.…
The LiPower board is based on the incredibly versatile TPS61200 boost converter. The board is configured to be used with a Li…
High quality switching 'wall wart' AC to DC 9V 650mA wall power supply manufactured specifically for Spark Fun Electronics. T…
This breakout board uses the LTC3588 Piezoelectric Energy Harvester from Linear Technologies. This board can be used not only…
Your 5V system can wield great power with this big, beefy relay board. How does 10A on the NC contacts and 20A on the NO cont…
This is a very simple board that takes a 6-12V input voltage and outputs a selectable 5V or 3.3V regulated voltage. All heade…
This is a very small, extremely lightweight battery based on Polymer Lithium Ion chemistry. This is the highest energy densit…
If you need to charge LiPo batteries, this simple charger will do just that, and do it fast! The SparkFun USB LiPo Charger is…
This is a high quality switching 'wall wart' AC to DC 5V 2000mA Barrel Jack wall power supply manufactured specifically for S…
6 pin SOT-23 to DIP adaptor. Created to take SOT23 of various pin sizes breakout to DIP. This will work with 3-pin MOSFETs, B…
CR1225 lithium metal 3V 12mm 47mAh coin cell batteries. Perfect small battery for miniature sensor node applications. Thes…
If you've ever wondered how to control the headlight of a car from a microcontroller, a MOSFET is what you need. This is a ve…
Do you want to control a standard wall outlet device with your microcontroller, but don’t want to mess with the high-voltag…
These are high quality Single Pole - Double Throw (SPDT) sealed relays. Use them to switch high voltage, and/or high current …
This is an 80W 3-in-1 (3 output ranges) Switching DC Power Supply. Gives a regulated 0-36VDC @ 2.2A, 80W max output. Takes a …
This simple cable has so many uses! Plug the 9 volt battery clip onto a standard 9V battery and connect the other end to anyt…
This is the SparkFun MOSFET Power Control Kit, a breakout PTH soldering kit for for the [RFP30N06LE](http://www.sparkfun.com/…
This is a simple 4 cell AA battery holder. The 5 inch cable is terminated with a standard 5.5x2.1mm, center positive barrel j…
Here is a very simple breadboard power supply kit that takes power from a DC wall wart and outputs a selectable 5V or 3.3V re…
Does your project need a little more *umph* than our wall wart adapters can supply? Why not give this a shot? This 2A "laptop…
Have a project that needs some good power? Do you like free power provided by our friend, Mr. Sun? Check out this high qualit…
LiPo batteries are a great way to power your projects. They're small, lightweight, and pack a pretty good punch for their siz…
The SparkFun Adjustable LiPo Charger is a single-cell lithium polymer (LiPo) and lithium ion battery charger. Because it’s …
If you need to charge LiPo batteries, this simple charger will do just that. It is designed to charge single-cell Li-Ion or L…
This is a high quality AC to DC 'wall wart' which produces a regulated output of 12VDC at up to 600mA. These are switch mode …
This is the same 18650 Lithium Ion Cell that you know and love, but now includes pre-attached solder tabs! These round high c…
This adapter allows you to connect a barrel jack connector to bare wires. One end has screw terminals and the other has a 5.5…
The KTA-223 Relay Board is a USB or RS485 controlled module that can interface a PC to eight or more SPDT relays. This could …
This is the basic LD1117V33 voltage regulator, a low drop positive regulator with a 3.3V fixed output voltage. This fixed reg…
This is a very simple board that takes a 4-9V input voltage and outputs a selectable 1.8V or 3.3V regulated voltage. All head…
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