Power & Batteries

SKU: AF-3951 | Brand: Adafruit

A 2×AA battery holder with a built-in knife switch for controlling power. Unlike typical slide switches, the knife switch provides a clear visual indicator of open and closed circuit states — making it an excellent to...

SKU: AF-501 | Brand: Adafruit

This 5V 1A USB power supply provides clean, regulated power for microcontrollers, development boards, and USB-charged devices. It accepts 110–240V AC input and outputs via a USB Type-A port, so you simply plug in what...

SKU: AF-3661 | Brand: Adafruit

The Adafruit MiniBoost is a tiny charge-pump voltage booster that converts 3–5 V input to a regulated 5 V output at up to 100 mA. About the size of a linear regulator, it's an easy drop-in solution for battery-powered...

SKU: AF-988 | Brand: Adafruit

This little dongle will let you connect one of our 5V 2Amp or 5V 10Amp adapters to something that expects to connect to USB. The premise is simple - one end has a USB A female jack and the other has a 'standard' 5....

SKU: AF-4053 | Brand: Adafruit

This panel mount cable will allow you to enclose a device that has a USB A port, and also converts it to a modern USB C connector at the same time. Perfect for placing your project in a secure box! One end is a USB Ty...

SKU: AF-1328 | Brand: Adafruit

Turn any 2.1 mm barrel-jack wall adapter into a handy bench power supply with this adapter cable. The moulded DC barrel jack connects to your power supply, while colour-coded alligator clips (red for centre-positive, ...

SKU: AF-1459 | Brand: Adafruit

This inductive charging set provides wireless power transfer using a split-transformer design. The transmitter coil is powered with 9–12 V DC, and the receiver coil outputs 3.3 V DC — no direct wire connection between...

SKU: DF-FIT0554 | Brand: DFRobot

The LiitoKala Lii-402 is a four-slot smart charger that supports Li-ion, Ni-MH, and LiFePO4 rechargeable batteries. It automatically identifies Li-ion and Ni-MH battery types, with manual mode selection for LiFePO4 an...

SKU: TB-PH9203 | Brand: Little Bird

This holder provides a simple way to add one AA cell to a battery-powered project. It is moulded in Delrin and uses corrosion-resistant nickel-plated springs and studs for reliable contact.The 150 mm bare lead connect...

SKU: AF-1868 | Brand: Adafruit

A simple breakout board with a CR1220 coin cell battery holder pre-soldered and broken out to 0.1″ pitch pins. Ideal for powering very low-current projects or providing battery backup for a real-time clock (RTC) modul...

SKU: AF-1870 | Brand: Adafruit

A simple sewable breakout board with a CR2032 coin cell battery holder pre-soldered on and 0.1" pitch breakout pins for easy connection. Ideal for powering very low-current projects or adding a battery backup circuit ...

SKU: AF-2124 | Brand: Adafruit

The Adafruit Pro Trinket LiIon/LiPoly Backpack is a tiny add-on board that sits on top of your Pro Trinket or ItsyBitsy, adding rechargeable LiPo battery support with automatic charging and power switching. When USB i...

SKU: DF-DFR0446 | Brand: DFRobot

In many applications, we will use lithium batteries as our power solutions. In this kind of application, the most two important things are the power boost and battery charger. These two points are a prerequisite for ...

SKU: DF-FIT0114 | Brand: DFRobot

This female to male DC power cable offers an easy solution for extending the length of a DC power supply. SPECIFICATIONS 2.1mm (0.08'') connector size High quality plug and jack with strain relie...

SKU: AF-2789 | Brand: Adafruit

The premise of this MicroUSB to 5.5/2.1mm DC Barrel Jack Adapter is simple. There's a MicroUSB plug on one end and a 5.5mm/2.1mm DC barrel jack with center positive polarity on the other. This allows you ...

SKU: AF-2777 | Brand: Adafruit

This USB to DC booster cable has an integrated boost converter that steps up 5V USB power to 9V DC, output through a centre-positive 2.1 mm barrel jack. It's a convenient way to power 9V devices from any USB port — wh...

SKU: SF-COM-00746 | Brand: SparkFun

A 10 F (farad) supercapacitor rated at 2.5 V. This compact energy storage device can be charged and slowly discharged to power low-current systems for extended periods. Two can be connected in series for 5 F at 5 V. ...

SKU: DF-FIT0253 | Brand: DFRobot

A 7.5 V DC wall adapter power supply with a DC 2.1 mm barrel connector, compatible with the Arduino power jack. The 7.5 V output is well suited for Arduino projects that need more than 5 V but where 12 V may be excess...

SKU: DF-DFR0250 | Brand: DFRobot

A boost converter module that takes two AA batteries and outputs a stable 5 V supply for your circuits. Built around the TI TPS61032 boost chip, it accepts input voltages from 1.8–4.5 V and delivers up to 5 V @ 1 A — ...

SKU: SF-BOB-11771 | Brand: SparkFun

This is a breakout board for the Texas Instruments TXB0104 module. The TXB0104 is a 4-bit bidirectional voltage-level translator with automatic direction sensing. This 4-bit noninverting translator uses two separate...