Batteries & Power supplies

This lithium-ion battery is small, light and durable. Through standard JST 2mm female connector, it will yield 3.7V which will supply your projects for a whole day (and night!). Furthermore, the battery has an implemented protection system, which prevents high voltages ( prevents over-charging), undervoltage and short circuit. That way it protects the battery, increases its lifetime and protects you from possible accidents!

• Nominal voltage: 3.7V
• Capacity: 1800mAh, 6.66Wh
• Dimensions: 60 x 31.4 x 8mm
• Standard JST-PH-2mm connector

DISCLAIMER: This battery has to be charged with a special charged that uses CC/CV principle. Li-ion batteries are dangerous! Read our tutorial (link in the top right corner) before use.

This 1500mah lithium battery is small, light and durable! Trough standard JST 2mm female connector it will give you normal 3.7V that will power your projects whole day (and night). With all this battery has a built-in system for protection from too high voltage (prevents overcharging), too low voltage and short circuit. That’s how it protects the battery and secures its longer work and protects you from the danger of this battery!

• Nominal voltage: 3.7V
• Capacity: 1500mAh, 5.55Wh
• Dimensions: 47.7 x 29.5 x 9.8mm
• Standard JST-PH-2mm connector

Warning: This battery must be charged with special charger principle CC/CV – like the charger recommended under. Li-ion batteries are dangerous! Read our tutorial (link right above) before use.

This 1200 mah battery is small, light and durable! Through a standard JST 2mm female connector it will give you normal 3.7V that will power your projects whole day (and night). It also has a built-in system for protection from too high a voltage (prevents overcharging), too low a voltage and short circuit. That’s how it protects the battery and ensure a long lasting and safe environment for your projects!

Warning: This battery must be charged with special charger principle CC/CV – like the charger recommended under. Li-ion batteries are dangerous! Read our tutorial (link right above) before use.

This lithium-ion battery is small, light and durable. Through standard JST 2mm female connector, it will yield 3.7V which will supply your projects for a whole day (and night!). Furthermore, the battery has an implemented protection system, which prevents high voltages ( prevents over-charging), undervoltage and short circuit. That way it protects the battery, increases its lifetime and protects you from possible accidents!

• Nominal voltage: 3.7V
• Capacity: 500mAh, 1.85Wh
• Dimensions: 5.7 x 19.7 x 47.1mm
• Standard JST-PH-2mm connector

DISCLAIMER: This battery has to be charged with a special charged that uses CC/CV principle. Li-ion batteries are dangerous! Read our tutorial (link in the top right corner) before use.

Holder for two AAA batteries of small dimensions with a JST connector at the end that connects to a standard input for batteries. Often used with BBC micro:bit.

The Solar Panel 1.5W 12V offers a compact, reliable solution for charging batteries and powering low-consumption electronics in off-grid applications. Designed to convert sunlight into electricity, it’s ideal for remote installations like weather stations, agricultural sensors, or small IoT devices. Its durable construction ensures consistent performance in varying environmental conditions.
 
Delivering 12V open-circuit voltage (Voc) and ~9V under load, the panel provides a maximum current of 166mA, compatible with standard 12V charge controllers and batteries. The laminated monocrystalline cells and pre-attached leads simplify installation, while its small footprint allows flexible mounting.
 
Perfect for keeping 12V batteries topped up or powering microcontroller-based projects, this panel supports energy-independent operation. Note: this panel should be used with a suitable charging controller (e.g., an MPPT charger) and not connected directly to a battery.

A small solar panel that will keep your Internet of Things alive for a very long time, but also for many other projects. It has waterproof silicone to protect the panel from water and sunlight.

The 8xAA battery holder with DC connector is a high-capacity, portable power solution for electronics projects. It accommodates eight AA batteries in series, providing a nominal 12V output, ideal for microcontrollers, motors, LED strips, and other 12V devices. The integrated 5.5mm × 2.1mm DC barrel jack simplifies connection to standard power inputs, allowing quick setup without additional wiring.
 
Designed for convenience and reliability, the holder features a secure battery compartment with a sliding cover for easy replacement and an on/off switch for immediate control. Its robust construction ensures consistent electrical contact and durability, making it suitable for both prototypes and finished projects.
 
Perfect for robotics, portable sensor nodes, amateur radio setups, and mobile installations, this battery holder offers a flexible, reliable power source. Combine it with your Qwiic-enabled systems or standalone electronics to ensure a stable 12V supply wherever your project goes.

Plastic holder for three AA batteries with two mounting holes. Connects batteries into series.

• Battery size: AA
• Number of batteries: 3

Plastic holder for four AA batteries with four mounting holes. Connects batteries into series.

• Battery size: AA
• Number of batteries: 4

Plastic holder for five AA batteries with two mounting holes. Connects batteries into series.

• Battery size: AA
• Number of batteries: 5

Plastic holder for six AA batteries with two mounting holes. Connects batteries into series.

• Battery size: AA
• Number of batteries: 6

The small power supply in a plastic case allows conversion from 230V AC to 12V DC voltage maximum current of 2A or power of 24W

Quality AAA battery manufactured in Germany. Voltage 1.5V.

Quality AA battery manufactured in Germany. Voltage 1.5V

Small, industrial power supply inside the iron enclosure enables 230V AC conversion into a 5V DC with 6A maximum current (30W).

Battery clip for a 9V battery. It allows connecting a circuit to the 9V battery.

Plastic holder for 1 AA battery, with 1 hole for mounting.

• Battery size: AA
• Number of batteries: 1
• Wire length: 10cm

Plastic holder for three AAA batteries, with three holes for mounting. Connects batteries in series.

• Battery size: AAA
• Number of batteries: 3
• Wire length: 9.8cm

Plastic holder for two AAA batteries, with three holes for mounting. Connects batteries in series.

• Battery size: AAA
• Number of batteries: 2
• Wire length: 15cm

Plastic holder for two AA batteries, with two holes for mounting. Connects batteries in series.

• Battery size: AA
• Number of batteries: 2
• Wire length: 15cm

This lithium-ion battery is small, light and durable. Through standard JST 2mm female connector, it will yield 3.7V which will supply your projects for a whole day (and night!). Furthermore, the battery has an implemented protection system, which prevents high voltages ( prevents over-charging), undervoltage and short circuit. That way it protects the battery, increases its lifetime and protects you from possible accidents!

This small battery is practical for smartwatch projects or other projects where battery dimensions are crucial.

• Nominal voltage: 3.7V
• Capacity: 40mAh, 0.15Wh
• Dimensions: 24 x 8.5 x 3.5mm
• Standard JST-PH-2mm connector

DISCLAIMER: This battery has to be charged with a special charged that uses CC/CV principle. Li-ion batteries are dangerous! Read our tutorial (link in the top right corner) before use.

A classic small power with an output of 5V / 2A which will ideally supply your project with an Arduino / Croduino. The output is standard female USB connector (type A). You can directly connect a cable from the PCB to the charger and use it as a constant power source, or it can be used for charging up a mobile phone/tablet. Or for a third purpose ..? In any case, it will be enough!

18650 battery holder allows easy use of lithium batteries in 18650 packaging. Otherwise, soldering these types of batteries is not recommended because the high temperature makes them lose their capacity. If you do not have a spot welding machine, we recommend that you get this kind of battery holder and you won’t have any problems with the loss of capacity, and it will allow you to use the batteries easily.