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Power / Batteries

Batteries
Battery Holders / Adapter
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Power Supply / Voltage Regulator
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Renewable Energy
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Opto-Isolated Relay Module - 16 Channels (5V)
$22.99  
1 pc(s)
This 16 channels Relay Module can be used to control the lighting, electrical and other equipments through the digital IO port. The digital input circuit is optically isolated from the relay, so your controller is protected from voltage spikes and surges. The module is controlled with 5V...
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-20%
4 x AAA Battery Holder with Cover and Switch
$2.00 $2.50  
13 pc(s)
Enclosed battery holder for four AAA cells. This holder features a lid that slides over the batteries and snaps into place to fully enclose the cells. It also features a switch that lets you open and close the electrical connection between the batteries and the holder's leads. The leads are...
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-9%
LiPo Charger Plus - USB Type-C
$15.00 $16.50  
1 pc(s)
The SparkFun LiPo Charger Plus is the souped-up power option in the SparkFun line of single-cell lithium polymer (LiPo) battery chargers. With this iteration, we've changed the input charge connector to USB-C and provided charge rate selection as well as optional thermal protection. Charge,...
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Sunflower Solar Power Manager 5V
$14.50  
3 pc(s)
Solar Power Manager 5V is a small power and high-efficiency solar power management module designed for 5V solar panel. It features as MPPT (Maximum Power Point Tracking) function, maximizing the efficiency of the solar panel. Apart from serving as a solar charger, the module can provide up to...
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-8%
SparkFun Sunny Buddy - MPPT Solar Charger
$37.50 $40.55  
1 pc(s)
This is the Sunny Buddy, a maximum power point tracking (MPPT) solar charger for single-cell LiPo batteries. This MPPT solar charger provide you with the ability to get the most possible power out of your solar panel or other photovoltaic device and into a rechargable LiPo battery. Set-up is...
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4 x AA Battery Holder with Switch & Barrel Jack
$3.50  
8 pc(s)
This 4xAA battery holder puts a nice finishing touch on your battery powered project. This holder features a removable sliding cover and an ON/OFF switch which can be used to control power to your project. The cable is terminated with a standard 5.5x2.1mm, center positive barrel jack...
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4 x 18650 Battery Holder
$3.00  
7 pc(s)
Battery holder for four 18650 Lithium Ion batteries, terminated with ~150mm leads
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-46%
1 x AA Battery Holder with Cover and Switch
$1.00 $1.85  
19 pc(s)
This 1xAA battery holder puts a nice finishing touch on your battery powered project. This holder features a removable sliding cover and an 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: 69 x 26...
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Round Shape 2 x CR2032 Coin Cell Battery Holder - 6V output with On/Off switch
$0.65  
7 pc(s)
This tiny coin cell battery holder is ideal for small portable or wearable projects. It holds two 20mm CR2032 coin cells in series to generate 6V nominal. CR2032 tends to have about 220mAh capacity so this holder would give you 6V @ 220mAh with two cells.
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-30%
Relay SPDT Sealed - 3V
$0.95 $1.35  
61 pc(s)
These are general purpose, Single Pole - Double Throw (SPDT) sealed relays. Use them to switch high voltage, and/or high current devices. This relay's coil has switch voltage of 3V at 120mA. The contacts are rated 10A at 120VAC, 10A at 30VDC. Features : 3V DC SPDT...
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DC Barrel Jack Plug - Female
$0.50  
39 pc(s)
This female barrel jack plug is great for adding a common connector to the end of wires. This jack is compatible with 5.5x2.1mm barrel connectors. The outer shell unscrews to reveal solder terminals and a crimp strain relief. The outer shell has strain relief as well.
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Hand Crank Generator
$14.95  
Out-of-stock
This hand-held crank generator produces up to 15 volts of DC electricity. The integrated PCB includes a full bridge rectifier to provide the same output polarity for either direction the hand crank is turning. In addition, other devices can be easily connected to the screw terminal.
Out-of-stock
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