There's two LEDs for monitoring the charge rate, a yellow one tells you its working, a green one lights up when its done. The charger circuitry is powered from a microUSB jack, and will recharge any 3.7V/4.2V LiIon or LiPoly battery at 1000mA max rate. To make this even more useful, we stuck a smart load-sharing Lipoly charger on the other side. ![]() 90%+ operating efficiency in most cases (see datasheet for efficiency graphs), and low quiescent current: 5mA when enabled and power LED is on, 20uA when disabled (power and low batt LED are off).Full breakout for battery in, control pins and power out.Solder in the USB connector and you can plug in any iPad, iPhone or iPod for 1000mA charge rate. Onboard 1000mA charge-rate 'iOS' data resistors.Low battery indicator LED lights up red when the voltage dips below 3.2V, optimized for LiPo/LiIon battery usage.Just make sure your battery can handle it! 2A internal switch (~2.5A peak limiting) means you can get 1000mA+ from a 3.7V LiPoly/LiIon battery.Synchronous operation means you can disconnect the output completely by connecting the ENable pin to ground.This boost converter chip has some really nice extras such as low battery detection, 2A internal switch, synchronous conversion, excellent efficiency, and 700KHz high-frequency operation. ![]() The PowerBoost 1000C has at the heart a TPS61090 boost converter from TI.
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