The laptop i made “the pi-berry laptop” is built around the raspberry pi 2. it has 1gb ram, quad core cpu, 4 usb ports and one ethernet port. the laptop.... Amazon.com: portable ac outlet battery pack by chargetech - 27000mah 85w / 110v (tsa approved for airline travel) - external power bank charger for macbooks, laptops, cameras, camping, cpap machines [black]: cell phones & accessories. I’m always complaining about all the chargers and wall warts i need to carry with me when going on a trip. this project, which can charge a pair of aa nickel metal hydride (nimh) or nickel cadmium (nicd) cells using a laptop’s usb port for power, arose to address part of that problem..
Here's a simple and inexpensive compact lithium ion / polymer battery charger based on microchip's mcp73831 ic. it features adjustable current charging from 15ma up to 500ma for single cell lipo batteries. with this lipo charger just a few external components are needed. constant voltage power. This is a lithium-ion charger for lipo batteries. circuit schematic shows configuration for charging single 3.7v lipo battery but voltage can be set to charge several batteries in series.. Update 10/31/2009: i finished remaking my pants and i think i've come up with a better stitching pattern. i'll leave the pictures of the old style....
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