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Lithium Ion Battery - 1250mAh (IEC62133 Certified)
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Price: $16.58
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Sparkfun Item #: PRT-18286 -

These are very slim, extremely light weight batteries based on Lithium Ion chemistry. Each cell outputs a nominal 3.7V at 1300mAh! 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. Battery includes built-in protection against over voltage, over current, and minimum voltage. Please use caution when using this battery in wearable...

Lithium Ion Battery Pack - 10Ah (3A/1A USB Ports)
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Price: $33.58
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Sparkfun Item #: PRT-15593 -

This is the same 10Ah battery pack that provides power to the SparkFun Jetbot! The multiple USB options for charging & discharging, along with a simple capacity indicator and power button make this a great option for mobile USB power on your next project. Features: 10,000 mAh capacity Micro USB Input: 5V 2A, 9V 2A Type-C Input: 5V 3A, 9V 2A, 12V 1.5A (PD 3.0 18W) USB Output: 5V 3A, 9V 2A, 12V 1.5A (QC 3.0 18W) Type-C Output: 5V 3A, 9V 2A, 12V 1.5A (PD 3.0 18W) ...

Soft Power Switch
Price: $7.50
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Availability: Out of Stock
Sparkfun Item #: SPX-17870 -

The Soft Power Switch is a passive, hard on/off switch with software feedback and control. In other words, it's like the on/off switch on a laptop. A simple press will turn the system on. Another press can (with MCU intervention) turn off the system. And if things go really wrong, pressing and holding the button will force a power-down. If you're building something with an enclosed battery and need a good power button, this is the board you need. The Sense/Control pin can act as an output to a...