{"product_id":"adafruit-universal-usb-dc-solar-lithium-ion-polymer-charger-bq24074","title":"Adafruit Universal USB \/ DC \/ Solar Lithium Ion\/Polymer charger - bq24074","description":"\u003cp\u003eThis charger is the only one you need to keep all your Lithium Polymer (LiPoly) or Lithium Ion (LiIon) rechargeable batteries topped up. No matter the power source at your disposal!\u003c\/p\u003e\n\u003cp\u003eThe Adafruit Universal USB \/ DC \/ Solar Lithium Ion\/Polymer Charger can use USB, DC or Solar power, with a wide 5-10V input voltage range!\u003c\/p\u003e\n\u003cp\u003eThe charger chip is super smart, and will reduce the current draw if the input voltage starts to dip under 4.5V, making it a perfect near-MPPT solar charger that you can use with a wide range of panels.\u003c\/p\u003e\n\u003cp\u003eEven though Adafruit designed it with solar in mind, it's also great as a plain USB or DC charger - we like that you can use 5V or 9V chargers without worry, and the high charge rate is great for quickly charging up those large battery packs!\u003c\/p\u003e\n\u003cp\u003eComes with an assembled charger board, and bit of header. \u003cb\u003eLipoly batteries and solar panels are sold separately!\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eCompared to their earlier, MCP73871-based charger this universal charger has some nice improvements:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUSB Type C port for modern computers and chargers\u003c\/li\u003e\n\u003cli\u003eUp to 1.5A charge rate\u003c\/li\u003e\n\u003cli\u003eUp to 10V input voltage, 28V protected\u003c\/li\u003e\n\u003cli\u003eLoad output is regulated to never be over 4.4V so it's safe for 3.3V regulators or 5V boost converters\u003c\/li\u003e\n\u003cli\u003eNo stabilization capacitor needed (although you can add one if you like!)\u003c\/li\u003e\n\u003cli\u003eSame load sharing so that DC\/USB\/Solar is prioritized over battery power when available, to keep the battery from cycling\u003c\/li\u003e\n\u003cli\u003ePower Good LED lets you know that the charger is working\u003c\/li\u003e\n\u003cli\u003eLess expensive\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eHowever...\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe max load current is 1.5A instead of 1.8A\u003c\/li\u003e\n\u003cli\u003eThere is no 'Done' LED - when the CHG LED turns off, thats how you know charging is complete\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis charger is a breeze to use for solar projects: pick up any of our many 3.7V\/4.2V LiIon batteries, and a 6V solar panel. Plug the battery into the BATT port using a 2-pin JST cable and the solar panel into the DC jack using a 2.1mm adapter cable Put the solar panel outside (and keep the battery out of the sun, it needs to be kept cool!) to start charging. You can power another project at the same time by connecting to the LOAD output port, which will never go above 4.4V.\u003c\/p\u003e\n\u003cp\u003eThe bq24074 which powers this design is great for solar charging, and will automatically draw the most current possible from the panel in any light condition Even thought it isn't a 'true' MPPT (max power point tracker), it has near-identical performance without the additional cost of a buck-converter. \u003ca href=\"https:\/\/learn.adafruit.com\/adafruit-bq24074-universal-charger-breakout\/design-notes\" target=\"_blank\"\u003eThe detailed tutorial on this charger includes a design document explaining how it all works.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eFor use with Adafruit Lipoly\/LiIon batteries only! Other batteries may have different voltage, chemistry, polarity or pinout.\u003c\/p\u003e\n\u003ch2\u003eFeatures:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e3.7V\/4.2V Lithium Ion or Lithium Polymer battery charger\u003c\/li\u003e\n\u003cli\u003eCharge with 5-10V DC, USB or 6-10V solar panel, can have both USB and DC plugged in at the same time, higher voltage source will be used.\u003c\/li\u003e\n\u003cli\u003eAutomatic charging current tracking for high efficiency use of any wattage solar panel\u003c\/li\u003e\n\u003cli\u003eUse any 6-10V solar panel\u003c\/li\u003e\n\u003cli\u003eTwo color indicator LEDs - Power good and Charging\u003c\/li\u003e\n\u003cli\u003eSet for 1000mA max charge rate, can be adjusted to 500mA or 1.5A by soldering closed a jumper\u003c\/li\u003e\n\u003cli\u003eWill always draw the most current possible from a solar cell - up to the max charge rate!\u003c\/li\u003e\n\u003cli\u003eSmart load sharing automatically uses the input power when available, to keep battery from constantly charging\/discharging, up to 1.5A draw. Load output is regulated to no-more-than 4.4V\u003c\/li\u003e\n\u003cli\u003eOptional Temperature monitoring of battery by soldering in a 10K NTC thermistor (not included) - suggested for outdoor projects where the battery may get hot (50°C) or cold (0°C).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/learn.adafruit.com\/adafruit-bq24074-universal-usb-dc-solar-charger-breakout\" target=\"_blank\"\u003ePrimary Guide: Adafruit Universal USB \/ DC \/ Solar Lithium Ion\/Polymer charger\u003c\/a\u003e - bq24074 - You've got batteries, we've got coulombs\u003c\/p\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":32236671828051,"sku":"ADA4755","price":14.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/products\/4755-06.jpg?v=1600864440","url":"https:\/\/shop.pimoroni.com\/en-eu\/products\/adafruit-universal-usb-dc-solar-lithium-ion-polymer-charger-bq24074","provider":"Pimoroni Ltd","version":"1.0","type":"link"}