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9V Alkaline Battery
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Price: $3.97
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Sparkfun Item #: PRT-10218 -

These are your standard 9 Volt alkaline batteries from Rayovac. Don't even think about trying to recharge these. Use them with Arduinos or with a voltage regulator to get a solid 5V for your project. Check below for 9V connectors. Note: This item is non-returnable. If this item arrives damaged or is not functioning properly, please do not hesitate to contact us to see if further actions may be taken.

9V Battery Holder
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Price: $5.30
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Sparkfun Item #: PRT-10512 -

This 9V battery holder allows your battery to snap in tight and holds it in place, which is great in situations where you don't want the battery just hanging. It also has three mounting holes so you can attach it securely to your enclosure. It is terminated with a standard 5.5x2.1mm, center-positive barrel jack.

9V Snap Connector
Price: $2.25
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Sparkfun Item #: PRT-00091 -

Classic 9V snap connector terminated with 2-pin polarized Molex connector with 0.1" spacing. The cable is 26AWG and is 5" in length.

Battery Holder - 18650 (PTH)
Price: $1.59
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Sparkfun Item #: PRT-13113 -

This is a PCB mount clip to hold a 18650 Lithium Ion Cell battery. Each battery holder is sold in single units, you'll need two for each battery. These work great for larger, high capacity applications where a drop-in rechargable cell is needed. These little guys are low cost and easy to use! Note: This part can be found in the Electromechanical Eagle library under 'Battery18650'. Documents: Datasheet Product Video ...

Battery Holder - 1x18650 (wire leads)
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Price: $1.99
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Sparkfun Item #: PRT-12899 -

This is an incredibly simple one cell 18650 Battery Holder. When someone thinks of 18650 Cells they tend to think of flashlights first, which is fair since that is what they have been primarily used for. However, with this battery holder you will gain the ability to incorporate 18650 cells into applications like robotics or prototyping by simply dropping one into this device and attaching the leads, that's it. Every 18650 Battery Holder is equipped with two 6" cables for power and ground, each...

Battery Holder - 1xAA (PTH)
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Price: $0.88
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Sparkfun Item #: PRT-07949 -

PCB mount clip to hold a AA battery. Sold in single units, you'll need two. These work great for small, low power applications that need a battery to run. Low cost and easy to use! Documents: Datasheet

Battery Holder - 1xAAA (PTH)
Price: $0.88
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Sparkfun Item #: PRT-12718 -

PCB mount clip to hold a AAA battery. Sold in single units, you'll need two for each battery. These work great for small, low power applications that need a battery to run. Low cost and easy to use! Documents: Datasheet

Battery Holder - 2x18650 (wire leads)
Price: $2.65
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Sparkfun Item #: PRT-12900 -

This is an incredibly simple two cell 18650 Battery Holder. When someone thinks of 18650 Cells they tend to think of flashlights first, which is fair since that is what they have been primarily used for. However, with this battery holder you will gain the ability to incorporate 18650 cells into applications like robotics or prototyping by simply dropping one into this device and attaching the leads, that's it. Every 18650 Battery Holder is equipped with two 6" cables for power and ground, each...

Battery Holder - 2xAA (JST-PH)
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Price: $2.65
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Sparkfun Item #: PRT-14299 -

This is a unique two-cell AA battery holder. The 6" (~150mm) cable has been terminated with a JST-PH connector. We used to recommend using this battery pack with the BBC micro:bit but due to inconsistent JST connector sizes from our supplier (just enough for it to get stuck), we no longer do. If you are looking for a battery pack that is a bit easier to plug and unplug from your micro:bit, we recommend picking up the AAA-sized version instead! Note: Please keep in mind that JST connectors are...

Battery Holder - 2xAAA with Cover and Switch
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Price: $2.65
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Sparkfun Item #: PRT-14219 -

This 2xAAA battery holder puts a nice finishing touch on your battery-powered project. This holder features a sliding, removable cover as well as an ON/OFF switch that can be used to control power to your project. The leads are about 150mm long, and the last 5mm of them are tinned. Features: 63 x 25 x 15mm

Battery Holder - 4xAA Square
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Price: $3.44
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Sparkfun Item #: PRT-00552 -

Simple 4 Cell AA Battery holder with 5" tinned leads, square configuration.

Battery Holder - 4xAA to Barrel Jack Connector
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Price: $5.30
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Sparkfun Item #: PRT-09835 -

This is a simple 4 cell AA battery holder. The 5 inch cable is terminated with a standard 5.5x2.1mm, center positive barrel jack connector. The connector mates with the barrel jack on the Arduino (among a number of other products) allowing you to easily make your project battery powered. Note: the average voltage regulator has about 1V of dropout (but can vary greatly). This pack, with normal alkaline batteries, will output ~5.5V causing a normal 5V board to run at around 4 to 4.5V. This...

Battery Holder 2xAA with Cover and Switch
Price: $2.71
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Sparkfun Item #: PRT-09547 -

This 2xAA battery holder puts a nice finishing touch on your battery powered project. This holder features a removable, sliding cover, which is secured with a small phillips head screw. Another bonus is the ON/OFF switch which can be used to control power to your project. The leads are about 150mm, and the last 5mm of them are tinned. Features: 67.9 x 32.8 x 18.25mm

Battery Holder 2xAA with Cover and Switch - JST Connector
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Price: $2.65
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Sparkfun Item #: PRT-09925 -

This 2xAA battery holder puts a nice finishing touch on your battery powered project. This holder features a removable, sliding cover, which is secured with a small Phillips head screw. Another bonus is the ON/OFF switch which can be used to control power to your project. The leads are about 150mm and are terminated with a JST-XH (2.50mm pitch) connector. Note: This battery holder is NOT compatible with the micro:bit. The micro:bit, Arduino Pro, and other boards utilize a JST-PH connector, not...

Battery Holder 3xAA with Cover and Switch
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Price: $3.44
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Sparkfun Item #: PRT-10891 -

This 3xAA battery holder puts a nice finishing touch on your battery powered project. This holder features a removable, sliding cover, which is secured with a small phillips head screw. Another bonus is the ON/OFF switch which can be used to control power to your project. The leads are about 150mm, and the last 5mm of them are tinned. Features: 68.5 x 47.5 x 19.6mm

Battery Holder 4xAA with Cover and Switch
Price: $3.44
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Sparkfun Item #: PRT-12083 -

This 4xAA battery holder puts a nice finishing touch on your battery powered project. This holder features a removable, sliding cover, which is secured with a small phillips head screw. Another bonus is the ON/OFF switch which can be used to control power to your project. The leads are about 150mm, and the last 5mm of them are tinned.

Coin Cell Battery - 20mm (CR2032)
Price: $3.52
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Sparkfun Item #: PRT-00338 -

CR2032 Lithium metal 3V 250mAh button cell battery. Great for powering low power processors or blink an LED for weeks at a time. Note: This battery is not available to ship to Alaska or Hawaii, or through any express services (2-day, overnight), or internationally. This is temporary! Check out our blog post for more information. Additionally orders may take longer to process and therefore do not qualify for same-day shipping. Sorry for any inconvenience this may cause! Note: This item is...

Coin Cell Battery Holder - 12mm (PTH)
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Price: $2.65
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Sparkfun Item #: PRT-07948 -

This is a through-hole 12mm coin cell battery holder. It's the unit we like to use as RTC backup and SRAM backup for GPS units. Holds battery in place with friction. Metal housing is +, PCB pad underneath is -. This battery holder is sold in single units. Documents: Datasheet

Coin Cell Battery Holder - 12mm (SMD)
Price: $1.77
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Sparkfun Item #: PRT-10592 -

This is the SMD version of PRT-07948, which is the unit we like to use as RTC backup and SRAM backup for GPS units. Holds battery in place with friction. The metal housing connects to the positive side of the battery and the PCB pad underneath is connected to the negative side. Documents: Datasheet

Coin Cell Battery Holder - 20mm (PTH)
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Price: $2.65
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Sparkfun Item #: PRT-00783 -

Basic 20mm coin cell holder. Posts can be inserted into 0.1" perf board! Holds the common CR2032 type batteries. Documents: Datasheet

Coin Cell Battery Holder - 20mm (SMD)
Price: $1.71
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Sparkfun Item #: PRT-11892 -

Now for all of your coin cell battery surface mount needs, the 20mm SMD Coin Cell Holder. This holder fits our 20mm Lithium Ion coin cell battery and holds the battery in place with friction. The metal housing connects to the positive (+) side of the battery and the PCB pad underneath is connected to the negative (-) side. Documents: Datasheet

Coin Cell Battery Holder - 2xCR2032 (Enclosed)
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Price: $3.44
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Sparkfun Item #: PRT-12618 -

This is a simple coin cell battery holder that can enclose two CR2032 batteries inside itself, and safely kept closed via two phillips head screws. Each battery holder will run batteries in series, output up to 6V, and is equipped with an On/Off slide switch and two 6" power wires (one positive and one negative) on the back.

LiPower - Boost Converter
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Price: $28.16
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Sparkfun Item #: PRT-10255 -

The LiPower board is based on the incredibly versatile TPS61200 boost converter. The board is configured to be used with a LiPo battery, has solder jumper selectable 5V and 3.3V output, and an under voltage protection of 2.6V. However, the board can also be used as a general purpose buck and boost regulator with an input voltage as low as 0.3V (default UVLO is 2.6V). With such a low input voltage and quiescent current , the board also works well in energy harvesting applications that use low...

Lithium Ion Battery - 5300mAh 11.1V
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Price: $216.56
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Sparkfun Item #: PRT-16233 -

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. The voltage is low enough not to tax your regulating circuits, and the discharge rate is high enough to accommodate a lot of electronics and a few small motors. This Gens Ace 5300 mAh, 30C, 3S LiPo battery has been customized for easy use with our ELEV‐8 quadcopters, and provides a longer flight time compared to our...

micro:bit Battery Holder - 2xAAA (JST-PH)
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Price: $3.44
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Sparkfun Item #: PRT-15101 -

This is a unique two-cell AAA battery holder built specifically for the BBC micro:bit. The 6" (~150mm) cable has been terminated with a JST-PH connector. The connector mates the JST socket on the micro:bit perfectly, allowing you to easily make your project battery powered. Note: Please keep in mind that JST connectors are not suited for constant and repeated removal and insertions and may wear out over time. ...

MyoWare Power Shield
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Price: $8.61
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Sparkfun Item #: DEV-13684 -

The MyoWare Power Shield is designed to take two standard CR2032 coin cell batteries to power the MyoWare Muscle Sensor. We have made this board in a way that the coin cell batteries are connected in parallel for extended capacity at a nominal 3.0V. Connecting the MyoWare Muscle Sensor to battery power allows for a cleaner signal while also eliminating the possibility of creating a dangerous current path to the power grid. One thing to note is that due to the size of the batteries, the remote...

Panasonic Alkaline Battery - AA
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Price: $1.24
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Sparkfun Item #: PRT-15201 -

These are your standard 1.5V AA alkaline batteries from Panasonic. Don't even think about trying to recharge these. Roughly 1500mAh per AA cell. Combine 4 to get ~6V peak, and ~4.8V as they hit their discharge curve. Sold in single units. But if you order four at a time, it makes it easy for us to package them. Note: This item is non-returnable. If this item arrives damaged or is not functioning properly, please do not hesitate to contact us to see if further actions may be taken. Documents:...

SparkFun LiPo Fuel Gauge
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Price: $19.33
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Sparkfun Item #: TOL-10617 -

LiPo batteries are a great way to power your projects. They're small, lightweight, and pack a pretty good punch for their size. Unfortunately, even the best batteries eventually run low on power and when they do it's often unexpected (and at the worst time). Don't be caught by surprise next time your board suddenly powers-down! The SparkFun LiPo Fuel Gauge connects your battery to your project and uses a sophisticated algorithm to detect relative state of charge and direct A/D measurement of...

SparkFun Nano Power Timer - TPL5110
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Price: $10.59
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Sparkfun Item #: PRT-15353 -

Sometimes we want our projects on, but sometimes we want to turn them off for a while to save power. The SparkFun Nano Power Timer will run while only consuming minimal power (approximately 35nA) and turn your project on after a set amount of time. When you are done polling your sensors, posting data to the web, writing to your logger, or planning world domination, your microcontroller can tell the Nano Power Timer to turn off the power. No more running your microcontroller all day when you...

Tenergy 5-in-1 Intelligent Battery Cell Meter
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Price: $29.84
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Sparkfun Item #: TOL-15348 -

Do you yearn for complete and total mastery of your battery pack situation? Like a mystical amulet in a fantasy film, the Tenergy 5-in-1 Intelligent Cell Meter takes you one step closer to becoming an all-seeing and all-powerful battery wizard. In addition to allowing you to check the voltage of your batteries and view the capacity and internal resistance of each individual cell in lithium-based packs, this product functions as both a battery discharger and a battery balancer. Evaluate the...

USB Power Meter (Color TFT LCD)
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Price: $45.90
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Sparkfun Item #: TOL-15571 -

This USB Power Meter is a versatile little tool that can provide voltage readings down to 0.01V and current to 0.001A, displayed on the built-in color TFT LCD, while your device is connected through it to a power source. You can also measure the capacity and power of battery packs/power banks as well as temperature and cable impedance! In addition to the main numeric measurement interface, you can also toggle to voltage and current bar graph interfaces (because who doesn't like a good graph?),...