What is it?

A circuit to take 2-5V input from Lithium-Ion/LiPo batteries (or any 2~5V battery), and boost up to 5.25V for USB output. Includes 2 ports, one of which is configured for older Apple devices (iPods, iPhone up to 4S, original iPad), and a USB 2 port configured as a Dedicated Charing Port, supporting up to 1.5A of output. Works with pretty much anything that runs on USB, including: smartphones, tablets, e-book readers, Arduino, RaspberryPi, and more.

• Input: 2-5V via JST PH-2 connector (works with most LiPo batteries)
• Output: 5.25V, 1.5A max (total, between both ports)
• Dimensions: 45mm x 20mm (1.771" x 0.787")
• Three 2mm mounting holes, centered 3mm from edges
• Based on ADP 1613 chip

Why did you make it?

We designed this circuit because there was no comparable product on the market, especially one that supported 1A+ of output. This component was designed to be included in the BootstrapSolar Chiqoo kit, but is useful for any project that needs a regulated 5V power supply from a 2-5V battery.

What makes it special?

• 2 USB ports
• support for up to 1.5A of output (when input is above ~3.7V)
• JST PH-2 (same connector used in most LiPo batteries)
• a port designed specifically to charge older Apple devices at up to 1A
• a port designed as a Dedicated Charging Port, modern devices will recognize it as a high speed charging port