Skip to main content
Free shipping over $99
Free Periodic Table Banner Pen over $49Free gift over $49
Free Periodic Table of Elements Mousepad over $149Free gift over $149
Home \ Robotics & Electronics
\ Batteries, Adapters & Power Supplies
![Panasonic CR2032 CMOS Lithium Battery with Leads and MOLEX Connector]()
45% OFF
Panasonic CR2032 CMOS Lithium Battery with Leads and MOLEX Connector
High-quality Panasonic CR2032 3V battery with wire leads and MOLEX 51021-0200-B (1.25mm pitch) connector already attached.
(14)
$5.99
$3.29
![Reverse Polarity JST Connector CR2032 Battery with Wire Leads (CMOS)]()
44% OFF
Reverse Polarity JST Connector CR2032 Battery with Wire Leads (CMOS)
Wrapped CR2032 battery with wire leads and JST SHR-02V-S-A (1.00 mm pitch) connector pre-attached.
$4.99
$2.79
![Tipsun AA Alkaline Batteries 2-pack - Mercury and Cadmium Free]()
38% OFF
Tipsun AA Alkaline Batteries 2-pack - Mercury and Cadmium Free
Excellent AA alkaline batteries at an amazingly low price. SGS compliant and Mercury and Cadmium free.
$1.95
$1.19
![Reverse Polarity MOLEX Connector CR2032 Battery with Wire Leads (CMOS)]()
43% OFF
Reverse Polarity MOLEX Connector CR2032 Battery with Wire Leads (CMOS)
A reverse-polarity wrapped CR2032 battery with attached wire leads - excellent for hobby electronics and science fair projects
(4)
$4.95
$2.79
![JST Connector CR2032 Lithium Battery with Wire Leads (CMOS)]()
44% OFF
JST Connector CR2032 Lithium Battery with Wire Leads (CMOS)
This CR2032 lithium metal coin battery has wire leads and a JST SHR-02V-S-B (1mm pitch) connector attached for easy connection to your equipment.
(4)
$4.99
$2.79
![MOLEX Connector CR2032 Battery with Wire Leads (CMOS)]()
44% OFF
MOLEX Connector CR2032 Battery with Wire Leads (CMOS)
A wrapped CR2032 battery with attached wire leads - excellent as a CMOS motherboard battery of for hobby electronics and science fair projects.
(13)
$4.99
$2.79
![9V Battery Snap to DC Plug Adapter]()
60% OFF
9V Battery Snap to DC Plug Adapter
Don't have a 9V power adapter? No problem! Use this handy 9V battery adapter.
$1.99
$0.79
![CR2032 Battery with Wire Leads and Connector (CMOS)]()
44% OFF
CR2032 Battery with Wire Leads and Connector (CMOS)
This is a standard CMOS computer or laptop motherboard replacement battery. High-quality CR2032 Lithium ion cell with leads and connector.
(18)
$4.99
$2.79
![Fast USB Charger Adapter - 5V 2A]()
40% OFF
Fast USB Charger Adapter - 5V 2A
This fast charge (5V 2A) power adapter can be used to charge mobile phones, tablets and other devices. It can also be used as a power supply for various science and electronics experiments.
$5.99
$3.59
![ICR 18650 Green Flat-Top Lithium-Ion Cell Rechargeable Battery - 3.7V 2600mAh]()
52% OFF
ICR 18650 Green Flat-Top Lithium-Ion Cell Rechargeable Battery - 3.7V 2600mAh
This rechargeable 18650 Lithium battery cell has a flat top and is perfect for battery power banks and holders.
(1)
$9.99
$4.75
![Adjustable USB Power Supply - DP2F - 0.5V to 30V 2A]()
25% OFF
Adjustable USB Power Supply - DP2F - 0.5V to 30V 2A
With this handy USB power supply you can get any voltage from 0.5V to 30V and up to 2A current.
$19.99
$14.95
![AAA Alkaline Batteries 2-pack - Mercury and Cadmium Free]()
51% OFF
AAA Alkaline Batteries 2-pack - Mercury and Cadmium Free
Excellent AAA alkaline batteries at an amazingly low price. SGS compliant and Mercury and Cadmium free.
$1.95
$0.95
![CR1225 Lithium Battery - 5 pack]()
58% OFF
CR1225 Lithium Battery - 5 pack
This is an affordable pack of five (5) CR1225 lithium batteries. Each battery is 3 Volts.
$2.99
$1.25
![Two USB Rechargeable Lithium-Ion AA Batteries with Cable]()
50% OFF
Two USB Rechargeable Lithium-Ion AA Batteries with Cable
You can use them just like standard AA batteries, and you can re-charge them using just a standard USB port up to 1000 times.
$19.99
$9.95
![USB Rechargeable Lithium-Ion 9V Battery with Cable]()
46% OFF
USB Rechargeable Lithium-Ion 9V Battery with Cable
You can use it just like a standard 9V battery, and you can re-charge it with just a standard USB port up to 1000 times,
$14.99
$7.95
![CR2025 3V Lithium Battery - 5 pack]()
56% OFF
CR2025 3V Lithium Battery - 5 pack
A blister pack of 5 CR2025 Lithium batteries, ideal for LED remote controls, watches, clocks, calculators, electronics, cameras, LED tools, and so much more!
$2.99
$1.29
![4 AA Panasonic Alkaline Plus Batteries]()
45% OFF
4 AA Panasonic Alkaline Plus Batteries
This is a four-pack of genuine AA Panasonic Alkaline Plus batteries. Great for science fair projects or science school lab.
$3.99
$2.19
![Lithium Ion Battery Charger - 4 Bays - USB Powered]()
33% OFF
Lithium Ion Battery Charger - 4 Bays - USB Powered
Keep your projects powered up and ready to go with our Lithium Ion Battery Charger featuring four independent bays.
$14.99
$9.95
![Digital Adjustable USB Power Supply - 1V to 30V 2A]()
40% OFF
Digital Adjustable USB Power Supply - 1V to 30V 2A
With this handy USB power supply you can get any voltage from 1V to 30V and up to 2A current.
(1)
$29.99
$17.95
![AG13 LR44 1.5V Alkaline Batteries - 10 pack]()
56% OFF
AG13 LR44 1.5V Alkaline Batteries - 10 pack
A blister pack of ten AG-13 LR44 alkaline batteries, ideal for watches, clocks, calculators, electronics, cameras, LED tools, and so much more!
$3.99
$1.75
![Breadboard Power Supply 3.3V 5V USB Arduino]()
50% OFF
Breadboard Power Supply 3.3V 5V USB Arduino
Affordable breadboard power supply with both 3.3V and 5V output.
$4.99
$2.49
![Single Lithium Battery Charge Controller 5V 1A]()
40% OFF
Single Lithium Battery Charge Controller 5V 1A
This handy little module board will allow you to charge a single 18650 Lithium rechargeable battery safely
$4.95
$2.95
![18650 Battery Charge Shield - 3V 5V DC Supply]()
42% OFF
18650 Battery Charge Shield - 3V 5V DC Supply
Great for teachers - no more wasting AA batteries! With outputs of 3V and 5V DC you can use this shield with a variety of circuits with lightbulbs, buzzers, DC motors, LEDs, etc.
$9.99
$5.75
![Digital USB Power Supply - Adjustable 1V-24V 1A]()
38% OFF
Digital USB Power Supply - Adjustable 1V-24V 1A
With this handy USB power supply you can get any voltage from 1V to 24V. Just plug it into your USB power bank or USB phone charger.
$12.99
$7.95
![6V DC 500mA Power Adapter]()
31% OFF
6V DC 500mA Power Adapter
6V DC 500mA Power Adapter
$12.99
$8.95
![3-12V 5A Adjustable DC Power Supply with Digital LCD Display]()
33% OFF
3-12V 5A Adjustable DC Power Supply with Digital LCD Display
Need an affordable DC power supply with an adjustable voltage and digital display? Look no further! This power supply is excellent for DIY hobby electronics projects, science fair projects, and school science labs.
$29.99
$19.95
![3.7V Lithium Battery Indicator Tester]()
48% OFF
3.7V Lithium Battery Indicator Tester
This visual/graphic voltmeter is excellent for checking the levels of 3.7V lithium cells - get the most from your batteries and devices!
$4.99
$2.59
![3-24V 2A Adjustable DC Power Supply with Digital LCD Display]()
33% OFF
3-24V 2A Adjustable DC Power Supply with Digital LCD Display
You can adjust the output of this power supply from 3V to 24V DC, and it will give you a maximum of 2A current - which is more than enough to power all your science projects.
(1)
$29.99
$19.95
![Analog Adjustable USB Power Supply - 1V to 30V 2A]()
20% OFF
Analog Adjustable USB Power Supply - 1V to 30V 2A
With this handy USB power supply you can get any voltage from 1V to 30V and up to 2A current with potentiometer (analog) adjustments.
$19.99
$15.95
![Thermoelectric Generator]()
20% OFF
Thermoelectric Generator
Use this generator to demonstrate the 2nd law of thermodynamics!
(3)
$49.99
$39.95
![Double 18650 Battery Charge Shield - 3V 5V DC Supply]()
44% OFF
Double 18650 Battery Charge Shield - 3V 5V DC Supply
Power all your hobby circuits with this handy battery shield.
$17.99
$9.99
![3M Double-Sided Adhesive Mounting Dots - 50pcs - 20mm diameter]()
46% OFF
3M Double-Sided Adhesive Mounting Dots - 50pcs - 20mm diameter
These double-sided adhesive dots are perfect when mounting CMOS batteries to the motherboard, or any other crafting project.
$12.99
$6.95
![Green USB Power Bank - 2600mAh 5V 1A]()
38% OFF
Green USB Power Bank - 2600mAh 5V 1A
This affordable USB power bank is great for charging your mobile devices or powering your hobby science projects.
$12.99
$7.95
![Adjustable DC Switching Power Supply - 0-30V 5A]()
23% OFF
Free shipping
Adjustable DC Switching Power Supply - 0-30V 5A
This power supply is perfect for use in classrooms or laboratories. The unit produces variable 0 to 30V DC at up to a maximum of 5A, and features a clean and easy-to-read digital display.
$129.99
$99.95
![12V 21Ah Lithium-Ion Rechargeable Battery]()
22% OFF
Free shipping
12V 21Ah Lithium-Ion Rechargeable Battery
This high-capacity Lithium-ion rechargeable battery is great for your next solar energy science project, electric vehicles and bikes, scooters, golf carts and more.
$179.99
$139
![Switching Power Supply - 3V to 12V]()
33% OFF
Switching Power Supply - 3V to 12V
This innovative adapter uses state-of-the-art switching technology to allow the user to choose various output voltages from a range between 3V and 12V
$29.99
$19.95
![3V-12V DC Variable Power Supply]()
25% OFF
3V-12V DC Variable Power Supply
Forget the batteries! This safe and reliable power supply is a convenient source of low voltage DC power. Dial easily turns to select the desired voltage and it plugs into a standard electrical outlet. 3V-12V DC, 1.25 amps max.
$79.99
$59.95
![4-Pack of INR18650 Lithium-Ion Rechargeable Batteries - 3.7V 2200mAh]()
35% OFF
4-Pack of INR18650 Lithium-Ion Rechargeable Batteries - 3.7V 2200mAh
These rechargeable Lithium INR 18650 batteries are an excellent replacement for more expensive ICR 18650 ones.
$19.99
$12.95
![ICR 18650 Blue Lithium-Ion Rechargeable Battery - 3.7V 2600mAh]()
40% OFF
ICR 18650 Blue Lithium-Ion Rechargeable Battery - 3.7V 2600mAh
This standard 3.7V rechargeable Lithium 18650 battery cell is perfect for solar science fair projects involving panels.
(9)
$9.99
$5.95
![Genecon DUE - 12V Hand-Crank DC Generator]()
20% OFF
Genecon DUE - 12V Hand-Crank DC Generator
Versatile and durable hand-crank DC generator that's perfect for science teachers.
(1)
$49.99
$39.50
![Genecon V3 - 3V Hand-Crank DC Generator]()
30% OFF
Genecon V3 - 3V Hand-Crank DC Generator
A compact and safe 3V hand-crank DC generator ideal for science classrooms.
$49.99
$34.50
Batteries, Adapters & Power Supplies
41 products
45% OFF
Panasonic CR2032 CMOS Lithium Battery with Leads and MOLEX Connector
High-quality Panasonic CR2032 3V battery with wire leads and MOLEX 51021-0200-B (1.25mm pitch) connector already attached.
(14)
44% OFF
Reverse Polarity JST Connector CR2032 Battery with Wire Leads (CMOS)
Wrapped CR2032 battery with wire leads and JST SHR-02V-S-A (1.00 mm pitch) connector pre-attached.
38% OFF
Tipsun AA Alkaline Batteries 2-pack - Mercury and Cadmium Free
Excellent AA alkaline batteries at an amazingly low price. SGS compliant and Mercury and Cadmium free.
43% OFF
Reverse Polarity MOLEX Connector CR2032 Battery with Wire Leads (CMOS)
A reverse-polarity wrapped CR2032 battery with attached wire leads - excellent for hobby electronics and science fair projects
(4)
44% OFF
JST Connector CR2032 Lithium Battery with Wire Leads (CMOS)
This CR2032 lithium metal coin battery has wire leads and a JST SHR-02V-S-B (1mm pitch) connector attached for easy connection to your equipment.
(4)
44% OFF
MOLEX Connector CR2032 Battery with Wire Leads (CMOS)
A wrapped CR2032 battery with attached wire leads - excellent as a CMOS motherboard battery of for hobby electronics and science fair projects.
(13)
60% OFF
9V Battery Snap to DC Plug Adapter
Don't have a 9V power adapter? No problem! Use this handy 9V battery adapter.
44% OFF
CR2032 Battery with Wire Leads and Connector (CMOS)
This is a standard CMOS computer or laptop motherboard replacement battery. High-quality CR2032 Lithium ion cell with leads and connector.
(18)
40% OFF
Fast USB Charger Adapter - 5V 2A
This fast charge (5V 2A) power adapter can be used to charge mobile phones, tablets and other devices. It can also be used as a power supply for various science and electronics experiments.
52% OFF
ICR 18650 Green Flat-Top Lithium-Ion Cell Rechargeable Battery - 3.7V 2600mAh
This rechargeable 18650 Lithium battery cell has a flat top and is perfect for battery power banks and holders.
(1)
25% OFF
Adjustable USB Power Supply - DP2F - 0.5V to 30V 2A
With this handy USB power supply you can get any voltage from 0.5V to 30V and up to 2A current.
51% OFF
AAA Alkaline Batteries 2-pack - Mercury and Cadmium Free
Excellent AAA alkaline batteries at an amazingly low price. SGS compliant and Mercury and Cadmium free.
58% OFF
CR1225 Lithium Battery - 5 pack
This is an affordable pack of five (5) CR1225 lithium batteries. Each battery is 3 Volts.
50% OFF
Two USB Rechargeable Lithium-Ion AA Batteries with Cable
You can use them just like standard AA batteries, and you can re-charge them using just a standard USB port up to 1000 times.
46% OFF
USB Rechargeable Lithium-Ion 9V Battery with Cable
You can use it just like a standard 9V battery, and you can re-charge it with just a standard USB port up to 1000 times,
56% OFF
CR2025 3V Lithium Battery - 5 pack
A blister pack of 5 CR2025 Lithium batteries, ideal for LED remote controls, watches, clocks, calculators, electronics, cameras, LED tools, and so much more!
45% OFF
4 AA Panasonic Alkaline Plus Batteries
This is a four-pack of genuine AA Panasonic Alkaline Plus batteries. Great for science fair projects or science school lab.
33% OFF
Lithium Ion Battery Charger - 4 Bays - USB Powered
Keep your projects powered up and ready to go with our Lithium Ion Battery Charger featuring four independent bays.
40% OFF
Digital Adjustable USB Power Supply - 1V to 30V 2A
With this handy USB power supply you can get any voltage from 1V to 30V and up to 2A current.
(1)
56% OFF
AG13 LR44 1.5V Alkaline Batteries - 10 pack
A blister pack of ten AG-13 LR44 alkaline batteries, ideal for watches, clocks, calculators, electronics, cameras, LED tools, and so much more!
50% OFF
Breadboard Power Supply 3.3V 5V USB Arduino
Affordable breadboard power supply with both 3.3V and 5V output.
40% OFF
Single Lithium Battery Charge Controller 5V 1A
This handy little module board will allow you to charge a single 18650 Lithium rechargeable battery safely
42% OFF
18650 Battery Charge Shield - 3V 5V DC Supply
Great for teachers - no more wasting AA batteries! With outputs of 3V and 5V DC you can use this shield with a variety of circuits with lightbulbs, buzzers, DC motors, LEDs, etc.
38% OFF
Digital USB Power Supply - Adjustable 1V-24V 1A
With this handy USB power supply you can get any voltage from 1V to 24V. Just plug it into your USB power bank or USB phone charger.
31% OFF
6V DC 500mA Power Adapter
6V DC 500mA Power Adapter
33% OFF
3-12V 5A Adjustable DC Power Supply with Digital LCD Display
Need an affordable DC power supply with an adjustable voltage and digital display? Look no further! This power supply is excellent for DIY hobby electronics projects, science fair projects, and school science labs.
48% OFF
3.7V Lithium Battery Indicator Tester
This visual/graphic voltmeter is excellent for checking the levels of 3.7V lithium cells - get the most from your batteries and devices!
33% OFF
3-24V 2A Adjustable DC Power Supply with Digital LCD Display
You can adjust the output of this power supply from 3V to 24V DC, and it will give you a maximum of 2A current - which is more than enough to power all your science projects.
(1)
20% OFF
Analog Adjustable USB Power Supply - 1V to 30V 2A
With this handy USB power supply you can get any voltage from 1V to 30V and up to 2A current with potentiometer (analog) adjustments.
20% OFF
Thermoelectric Generator
Use this generator to demonstrate the 2nd law of thermodynamics!
(3)
44% OFF
Double 18650 Battery Charge Shield - 3V 5V DC Supply
Power all your hobby circuits with this handy battery shield.
46% OFF
3M Double-Sided Adhesive Mounting Dots - 50pcs - 20mm diameter
These double-sided adhesive dots are perfect when mounting CMOS batteries to the motherboard, or any other crafting project.
38% OFF
Green USB Power Bank - 2600mAh 5V 1A
This affordable USB power bank is great for charging your mobile devices or powering your hobby science projects.
23% OFF
Free shipping
Adjustable DC Switching Power Supply - 0-30V 5A
This power supply is perfect for use in classrooms or laboratories. The unit produces variable 0 to 30V DC at up to a maximum of 5A, and features a clean and easy-to-read digital display.
22% OFF
Free shipping
12V 21Ah Lithium-Ion Rechargeable Battery
This high-capacity Lithium-ion rechargeable battery is great for your next solar energy science project, electric vehicles and bikes, scooters, golf carts and more.
33% OFF
Switching Power Supply - 3V to 12V
This innovative adapter uses state-of-the-art switching technology to allow the user to choose various output voltages from a range between 3V and 12V
25% OFF
3V-12V DC Variable Power Supply
Forget the batteries! This safe and reliable power supply is a convenient source of low voltage DC power. Dial easily turns to select the desired voltage and it plugs into a standard electrical outlet. 3V-12V DC, 1.25 amps max.
35% OFF
4-Pack of INR18650 Lithium-Ion Rechargeable Batteries - 3.7V 2200mAh
These rechargeable Lithium INR 18650 batteries are an excellent replacement for more expensive ICR 18650 ones.
40% OFF
ICR 18650 Blue Lithium-Ion Rechargeable Battery - 3.7V 2600mAh
This standard 3.7V rechargeable Lithium 18650 battery cell is perfect for solar science fair projects involving panels.
(9)
20% OFF
Genecon DUE - 12V Hand-Crank DC Generator
Versatile and durable hand-crank DC generator that's perfect for science teachers.
(1)
30% OFF
Genecon V3 - 3V Hand-Crank DC Generator
A compact and safe 3V hand-crank DC generator ideal for science classrooms.