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Maxlife Alkaline Batteries 20 Pack Green
Price: $13.66
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MK-Misc Item #: BATAAA-A -

Maxlife Alkaline AAA size batteries.Features and benefitsLong lasting alkaline formula.For everyday and high drain devices.Long shelf life.No mercury or cadmium.SpecificationsBattery Capacity (mAh) 1,200.00Battery Power Type AlkalineBrand Name MaxlifeCell Size AAAPackage Quantity 20Rechargeable NoVoltage (V) 1.50Perfect for Edison RobotsWe ran Maxlife and Nicad batteries in an Edison robot continuously driving it in a big circle and these are the results of how long they lasted.Green generic...

Battery Holder With Switch - 4 x AA
Price: $2.33
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Elecrow Item #: EL-PSB00402B -

The 4 x AA Battery Holder with Switch 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 145mm, and the last 5mm of them are tinned. It is series connection.Specification4 AA batteriesWith a cover and fixed screwWith a ON/OFF switch ...

9V Snap Connector
Price: $2.08
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Sparkfun Item #: PRT-00091 -

"Classic 9V connector terminated with 2-pin polarized Molex connector. 5" in length."

Coin Cell Battery - 12mm (CR1225)
Price: $3.25
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Sparkfun Item #: PRT-00337 -

"CR1225 lithium metal 3V 12mm 47mAh coin cell batteries. Perfect small battery for miniature sensor node applications. These batteries are sold in single units. Note: Due to the requirements of shipping these batteries, 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 non-returnable. If this item arrives damaged or is not functioning properly, please do not hesitate to contact us to see if...

Battery Holder - 18650 (PTH)
Price: $1.25
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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 " ...

SparkFun LiPo Charger Basic - Mini-USB
Price: $13.25
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Sparkfun Item #: PRT-10401 -

"If you need to charge LiPo batteries, this simple charger will do just that. It is designed to charge single-cell Li-Ion or Li-Polymer batteries. Check the datasheet below to see if it will work with your battery. The board incorporates a charging circuit, status LED, connector for your battery (JST-type used in the batteries we carry), and a mini-USB connector. However, we do not recommend this charger with a 110mAh battery. Note: This version uses a mini-USB cable. We also have this charger...

Battery Holder with Switch - 2 x AA
Price: $1.17
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Elecrow Item #: EL-PSB00202B -

The 4 x AA Battery Holder with Switch 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 145mm, and the last 5mm of them are tinned. It is series connection.Specification2 AA batteriesWith a cover and fixed screwWith a ON/OFF switch ...

Coin Cell Battery Holder - 20mm (PTH)
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Price: $2.47
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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"

Battery Holder - 1x18650 (wire leads)
Price: $1.65
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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...

SparkFun USB LiPoly Charger - Single Cell
Price: $24.92
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Sparkfun Item #: PRT-12711 -

"If you need to charge LiPo batteries, this simple charger will do just that, and do it fast! The SparkFun USB LiPo Charger is a basic charging circuit that allows you to charge 3.7V LiPo cells at a rate of 500mA or 100mA. It is designed to charge single-cell Li-Ion or Li-Polymer batteries. The board incorporates a charging circuit, status LED, selectable solder jumper for 500mA or 100mA charging current, external LED footprint, USB input, two pre-installed JST connectors for SYS OUT and BATT...

Battery Holder - 4xAA to Barrel Jack Connector
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Price: $4.11
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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...

Coin Cell Battery - 20mm (CR2032)
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Price: $3.22
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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: Due to the requirements of shipping these batteries, 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 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....

Polymer Lithium Ion Battery - 6Ah
Price: $56.97
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Sparkfun Item #: PRT-08484 -

Polymer Lithium Ion Battery - 6Ah Description: If you need some juice, this 6Ahr triple pack is for you. These are very slim, extremely light weight batteries based on the new Polymer Lithium Ion chemistry. This is the highest energy density currently in production. Each cells outputs a nominal 3.7V at 2000mAh! This solid 3 cell pack (6Ahr) comes terminated with a standard 2-pin JST connector - 2mm spacing between pins. Do not attempt to charge these with anything but a charger...

2500 mAh NiMH Battery - AA
Price: $4.87
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Sparkfun Item #: PRT-00335 -

"2500mAh 1.2V Nickel Metal Hydride rechargeable ‘AA’ batteries. NiMH technology provides all the benefits of NiCads without the toxic ingredients and without the memory effect problem! 2500 mAh is a large capacity cell perfect for handheld, RF, and digital camera applications. We use these in everything! 26 grams per cell. 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...

750 mAh Alkaline Battery - AAA
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Price: $0.82
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Sparkfun Item #: PRT-09274 -

"These are your standard 1.5V AAA alkaline batteries from Rayovac. Don’t even think about trying to recharge these. Roughly 750mAh per AAA cell. Combine 4 to get ~6V peak, and ~4.8V as they hit their discharge curve. Sold in single units. 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: $4.85
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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."

Battery Holder - 1xAA (PTH)
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Price: $0.82
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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: $0.82
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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)
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Price: $2.47
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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...

Battery Holder - 4xAA Square
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Price: $3.21
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Sparkfun Item #: PRT-00552 -

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

Battery Holder 2xAA with Cover and Switch
Price: $2.48
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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. Dimensions: 67.9 x 32.8 x 18.25mm"

Battery Holder 2xAA with Cover and Switch - JST Connector
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Price: $2.47
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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. Dimensions: 67.9 x 32.8 x 18.25mm"

Battery Holder 2xAAA with Cover and Switch
Price: $2.48
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Sparkfun Item #: PRT-09543 -

"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 which can be used to control power to your project. The leads are about 150mm long, and the last 5mm of them are tinned. Dimensions: 63 x 25 x 15mm"

Battery Holder 3xAA with Cover and Switch
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Price: $3.21
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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. Dimensions: 68.5 x 47.5 x 19.6mm"

Battery Holder 4xAA with Cover and Switch
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Price: $3.21
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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."

Button Cell Battery - 11.6mm (LR44)
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Price: $1.56
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Sparkfun Item #: PRT-11305 -

"These LR44 button cell batteries are fairly common but it can be hard to keep them around. They fit our digital calipers, so if you use yours as much as we use ours, you may want to go ahead and pick up a spare. 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. Features: 1.5 VDC R44 Size Button Cell Zinc-Manganese Alkaline Compatible with LR1154, AG13, A76, 157, etc. " ...

Coin Cell Battery - 24.5mm (Rechargeable CR2450)
Price: $4.87
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Sparkfun Item #: PRT-10319 -

"A really cool rechargeable Lithium Ion coin cell battery. The battery is rated for 3.6V @ 110mAh - a great way to run a small embedded project for hours. This battery is a standard CR2450 battery size. Note: Due to the requirements of shipping these batteries, 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 non-returnable. If this item arrives damaged or is not functioning properly, please do...

Coin Cell Battery Holder - 12mm (PTH)
OOD!
Price: $2.47
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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)
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Price: $1.56
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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 (SMD)
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Price: $1.57
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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 - 24.5mm (PTH)
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Price: $1.56
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Sparkfun Item #: PRT-08863 -

"Through hole 24.5 mm coin cell holder. This holder fits our rechargeable 24.5mm Lithium Ion coin cell battery. Holds battery in place with friction. Metal housing is +, PCB pad underneath is -. Documents: Datasheet "

LiPower - Boost Converter
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Price: $24.60
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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 - 400mAh
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Price: $8.17
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Sparkfun Item #: PRT-13851 -

"This is a very small, extremely lightweight battery based on Lithium Ion chemistry, with the highest energy density currently in production. Each cell outputs a nominal 3.7V at 400mAh! Comes terminated with a standard 2-pin JST-PH connector with 2mm spacing between pins. These batteries require special charging; do not attempt to charge these with anything but a specialized Lithium Polymer charger. The battery includes built-in protection against over voltage, over current, and minimum...

Lithium Ion Battery - 850mAh
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Price: $15.94
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Sparkfun Item #: PRT-13854 -

"These are very slim, extremely light weight batteries based on Lithium Ion chemistry. Each cell outputs a nominal 3.7V at 850mAh! Comes terminated with a standard 2-pin JST-PH connector - 2mm spacing between pins. These batteries require special charging. Do not attempt to charge these with anything but a specialized LiPo charger. Battery includes built-in protection against over voltage, over current, and minimum voltage. Please use caution when using this battery in wearable projects. When...

Maxlife Rechargeable Batteries AA Blue (x2)
Price: $12.68
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MK-Misc Item #: BATAA-R2 -

Maxlife Rechargeable Batteries AA BlueIdeal for high drain devices.Features and benefitsVoltage: 1.5.Capacity:2500mAh.Operating Temperature: -20 to 50 deg Cel.2 batteries in one packet.Safety Data sheet can be found here

Maxlife Rechargeable Batteries AAA Blue (x2)
Price: $12.68
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MK-Misc Item #: BATAAA-R2 -

Maxlife Rechargeable Batteries AAA BlueIdeal for high drain devices.Features and benefitsVoltage: 1.5.Capacity:900mAh.Operating Temperature: -20 to 50 deg Cel.2 batteries in one packet.Safety Data sheet can be found here

Polymer Lithium Ion Battery - 110mAh
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Price: $8.17
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Sparkfun Item #: PRT-13853 -

"This is a very small, extremely light weight battery based on the new Polymer Lithium Ion chemistry. This is the highest energy density currently in production. Each cells outputs a nominal 3.7V at 110mAh! Comes terminated with a standard 2-pin JST-PH connector - 2mm spacing between pins. These batteries require special charging so please do not attempt to charge these with anything but a specialized Lithium Polymer charger. Each battery includes a built-in protection against over voltage,...

Polymer Lithium Ion Battery - 18650 Cell (2600mAh, Solder Tab)
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Price: $10.73
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Sparkfun Item #: PRT-13189 -

"This is the same 18650 Lithium Ion Cell that you know and love, but now includes pre-attached solder tabs! These round high capacity cells have been mainly used in flashlight type applications but with its capability to be used as a drop-in rechargable cell at 3.7V with a capacity of 2600mAh. This battery has been made even better with the attached solder tabs. You now have a much wider range of applications to drop this battery into while still remaining simple to install! These 18650 Cells...

SparkFun 3.3V Step-Up Breakout - NCP1402
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Price: $9.79
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Sparkfun Item #: PRT-10967 -

"The NCP1402 is a 3.3V DC-DC converter. The breakout board will accept voltage inputs between 1 and 3 Volts (such as 1 or 2 AA batteries) and output a constant, low ripple 3.3V output capable of sourcing up to 200 mA. This board is great for supplying power to 3.3V sensors or providing 3.3V from a a single AA battery. The breakout board includes the necessary peripheral components. The input, output and ground pins are broken out on a 0.1" grid to allow easy access on a breadboard. Documents:...

SparkFun 5V Step-Up Breakout - NCP1402
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Price: $9.79
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Sparkfun Item #: PRT-10968 -

"The NCP1402 is a 5V DC-DC converter. This breakout board will accept voltage inputs between 1 and 4 Volts and output a constant, low ripple 5V output capable of sourcing up to 200 mA. This board is great for supplying power to 5V sensors on a 3.3V board, or providing 5V from a AA battery. The breakout board includes all of the necessary peripheral components. The input, output and ground pins are broken out on a 0.1" grid to allow easy access on a breadboard. Documents: Schematic Eagle...

SparkFun Battery Babysitter - LiPo Battery Manager
Price: $32.92
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Sparkfun Item #: PRT-13777 -

"The SparkFun Battery Babysitter is an all-in-one single-cell Lithium Polymer (LiPo) battery manager. It’s half battery charger, half battery monitor, and all you’ll ever need to keep your battery-powered project running safely and extensively. The Battery Babysitter features a pair of Texas Instruments LiPo-management ICs: a BQ24075 battery charger and a BQ27441-G1A fuel gauge. The charger supports adjustable charge rates of up to 1.5A, as well as USB-compliant 100mA and 500mA...

SparkFun LiPo Charger Basic - Micro-USB
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Price: $13.08
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Sparkfun Item #: PRT-10217 -

"If you need to charge LiPo batteries, this simple charger will do just that, and do it fast! The SparkFun LiPo Charger Basic is stripped down of all features and just does one thing well - charge 3.7V LiPo cells at a rate of 500mA. It is designed to charge single-cell Li-Ion or Li-Polymer batteries. Check the datasheet below to see if it will work with your battery. The board incorporates a charging circuit, status LED, connector for your battery (JST-type used in the batteries we carry), and...

SparkFun LiPo Fuel Gauge
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Price: $16.37
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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...

SparkFun LiPoly Fast Charger - 5V Input
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Price: $32.83
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Sparkfun Item #: PRT-08293 -

"A SparkFun original Lithium Polymer charger. This little black box charges single cell lithium polymer batteries with a max rate of 1A. The charge output is via a 2-pin screw terminal. Top pin is ground, bottom pin is charge pin. Based on the popular Microchip part MCP73843-410. Note: This charger requires a 5V 1A power supply but does NOT include one with the order. A power supply will need to be purchased separately. Documents: MCP73843 Datasheet Schematic Pinout " ...

SparkFun Power Cell - LiPo Charger/Booster
Price: $33.25
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Sparkfun Item #: PRT-11231 -

"The PowerCell board is a single cell LiPo boost converter (to 3.3V and 5V) and micro-USB charger in one. The board comes with a JST connector for a single cell LiPo battery, a micro-USB connector for the 5V charge input, and selectable 3.3V and 5V output pins (labeled ‘out’). There are also two charge pins broken out (labeled ‘charge’), so you can use another 5V power source to charge the batteries, if you don’t have a micro-USB cable. We’ve also broken out...

SparkFun Wake on Shake
Price: $41.58
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Sparkfun Item #: SEN-11447 -

"Have you ever wanted your project to just “hibernate” until someone picks it up or moves it? It’s a great strategy for dramatically extending the battery life of a widget that doesn’t need to be active all the time. The SparkFun Wake-on-Shake board is designed to make it really simple to do just that! The Wake-on-Shake, based on a concept by Nitzan Gadish of Analog Devices, combines the ATTiny2313A with the ADXL362 low-power MEMS accelerometer to cut power to your...

Uh-oh Battery Level Indicator Kit
Retail: $11.27
Price: $7.84
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Sparkfun Item #: KIT-11087 -

Uh-oh Battery Level Indicator Kit Description: Under-powering a digital device can sometimes have pretty nasty consequences. Brown-out conditions can cause memory to get written or overwritten in odd ways, can cause unexpected behavior in connected systems and just generally screw up your day. One way to avoid this is to keep an eye on your battery voltage and turn off the system before it gets too low (or plug it in). We've whipped up a little board to help you out with this...