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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 ...

Coin Cell Battery - 20mm (CR2025)
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Price: $3.26
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Sparkfun Item #: PRT-11928 -

"This is the CR2025 20mm coin cell battery. You may be wondering what sets this guy apart from the more common CR2032 coin cell battery, the answer is actually quite important. The CR2025 is actually 0.7mm thinner, than the CR2032, and is only rated at 165mAh. Some applications need a thinner battery to conserve space, and the CR2025 fits the bill. This thin guy is a perfect mid-sized battery for calculator and remote control applications! Note: Due to the requirements of shipping these...

Coin Cell Battery - 12mm (CR1225)
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Price: $3.26
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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...

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."

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 ...

Battery Holder - 4xAA to Barrel Jack Connector
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Price: $4.18
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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...

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 - 18650 (PTH)
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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 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...

Coin Cell Battery Holder - 20mm (PTH)
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Price: $2.51
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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...

Coin Cell Battery - 20mm (CR2032)
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Price: $3.26
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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....

Coin Cell Battery - 24.5mm (Rechargeable CR2450)
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Price: $4.94
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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...

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

Polymer Lithium Ion Battery - 2000mAh
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Price: $21.67
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Sparkfun Item #: PRT-08483 -

"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 battery comes terminated with a standard 2-pin JST-PH connector - 2mm spacing between pins. Do not attempt to charge these with anything but a charger specifically designed for Lithium Ion batteries. Battery includes built-in protection against over voltage, over current, and minimum...

Polymer Lithium Ion Battery - 6Ah
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Price: $50.11
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Sparkfun Item #: PRT-13856 -

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

Uh-oh Battery Level Indicator Kit
Retail: $11.27
Price: $7.84
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Availability: Stocked-NoBackOrder
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...

Lithium Ion Battery - 400mAh
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Price: $8.28
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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...

Coin Cell Battery Holder - 24.5mm (PTH)
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Price: $1.59
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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 "

1500 mAh Alkaline Battery - AA
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Price: $0.84
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Sparkfun Item #: PRT-09100 -

"These are your standard 1.5V AA alkaline batteries from Duracell. 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." ...

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: $0.84
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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 Alkaline Battery
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Price: $3.26
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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: $4.94
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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: $0.84
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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)
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Price: $0.84
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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: $2.51
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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: $3.26
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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: $2.51
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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: $3.26
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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: $3.26
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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: $1.59
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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 Holder - 12mm (PTH)
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Price: $2.51
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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: $1.59
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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: $1.59
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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: $3.26
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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."

E-Textiles Battery - 110mAh (2C Discharge)
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Price: $11.63
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Sparkfun Item #: PRT-13112 -

"This is a very small, extremely lightweight battery based on Polymer Lithium Ion chemistry. This is the highest energy density currently in production. Each cells outputs a nominal 3.7V at 110mAh but limited to a 2C discharge! 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 Lithium Polymer charger. What sets this battery apart from our other 110mAh...

Li-Ion/Polymer Battery Charger/Balancer - 50W, 5A
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Price: $56.47
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Sparkfun Item #: PRT-10473 -

"This charger accurately balances and charges Lithium Polymer, LiFe (A123), NiCd and NiMH batteries. It will handle 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. The intuitive menu system means charging and cycling is an easy process and can be done quickly and accurately either in the field, by using a 12V input such as a car battery, or at home with a 12V power supply. Bundled with the charger are...

LiPower - Boost Converter
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Price: $25.01
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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 - 850mAh
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Price: $16.65
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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 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 - 1000mAh 7.4v
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Price: $16.65
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Sparkfun Item #: PRT-11855 -

"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. The battery has two cells and outputs 7.4V storing 1000mAh of charge. Because this is a dual cell battery pack, a special charger is needed. This battery is...

Polymer Lithium Ion Battery - 110mAh
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Price: $8.28
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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)
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Price: $9.96
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Sparkfun Item #: PRT-12895 -

"No, these aren’t some sort of weird, blue AA battery, this is actually a 18650 Lithium Ion Cell. 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 is a great battery option for those of you who need a simple to install and replace cell with a lot of juice. These 18650 Cells have a standard discharge current of 0.2C to a maximum of 1C and can...

Polymer Lithium Ion Battery - 2200mAh 7.4v
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Price: $26.69
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Sparkfun Item #: PRT-11856 -

"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. The battery has two cells and outputs 7.4V storing 2200mAh of charge. Because this is a dual cell battery pack, a special charger is needed. This battery is...