75W Volt Step-Down Buck Converter Lithium Ni/MH Ni/Cd Battery Charger LED Drive, US $14.50 – Picture 0

75W Volt Step-Down Buck Converter Lithium Ni/MH Ni/Cd Battery Charger LED Drive, US $14.50 – Picture 1

75W Volt Step-Down Buck Converter Lithium Ni/MH Ni/Cd Battery Charger LED Drive, US $14.50 – Picture 2

75W Volt Step-Down Buck Converter Lithium Ni/MH Ni/Cd Battery Charger LED Drive, US $14.50 – Picture 3

75W Volt Step-Down Buck Converter Lithium Ni/MH Ni/Cd Battery Charger LED Drive, US $14.50 – Picture 4

75W Volt Step-Down Buck Converter Lithium Ni/MH Ni/Cd Battery Charger LED Drive, US $14.50 – Picture 5

75W Volt Step-Down Buck Converter Lithium Ni/MH Ni/Cd Battery Charger LED Drive, US $14.50 – Picture 6

75W Volt Step-Down Buck Converter Lithium Ni/MH Ni/Cd Battery Charger LED Drive, US $14.50 – Picture 7

75W Volt Step-Down Buck Converter Lithium Ni/MH Ni/Cd Battery Charger LED Drive, US $14.50 – Picture 8

75w Volt Step-down Buck Converter Lithium Ni/mh Ni/cd Battery Charger Led Drive

US $14.50

default, Hong Kong
Jun 9th

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???? 1 A gentle note from seller: when choosing other items in our store, please use the 'add to cart' button in the price area. This would save time when buying multiple items. 3-Functions in 1 Unit Voltage Step Down + Battery Charger + LED Constant Current Driver With Acrylic Cover Box for protection (The acrylic parts come un-assembled. Buyer need to assemble the acrylic covers onto the board) Product Functions: 1, Use the board as a voltage buck (step-down) circuit, with over-current protection. 2, Use as charger for various lithium, Ni/MH, Ni/Cd batteries, solar power and wind power generator. 3, LED constant current driver (Details of each function to be explained at lower part of this page). Special Features Description: 1, The board can display voltage, current, power. Now even without a multi-meter, we can use this board at ease. 2, Onboard we have a USB connector: it can charge your electronic devices (Note: the USB output voltage is the same as output voltage of this board. It is not necessarily 5V. Please double check to make sure before charging your device with the USB) 3, Designed with two modes: constant voltage and constant current. Onboard LED can indicate the board is in which mode.(pls refer to board diagram for detail) 4, When using as a lithium battery charger, we can set floating charge voltage and charge current. Onboard LED can indicate whether the battery is being charged, or fully charged. 5, With current limit protection: when output is shorted, the board will not burn. 6, Automatic calibration of voltage and current to ensure high precision. Specifications: Input Voltage: 5-36V Output Voltage: 1.25-32V continuously adjustable Output Current: adjustable. Max 5A (recommend to use within 4.5A) Output Power: Max 75W (recommend to use within 50W. When using at large voltage drop, please lower the power) Working Frequency: 180KHz Working Temperature: -40 to 85 Celsius Degrees Conversion Efficiency: Max 96% Short-Circuit Protecion: Yes Over-Temperature Protection: Yes (When over-temperature, will automatically shut off output) Wront Polarity Protection: No. (If needed, please serial-connect a high current diode at the input) Board Size: 68.2 * 38.8 * 15mm (Not including the acrylic box) Details on Use of the Board: A. Use the board as a voltage buck step-down circuit: 1) Press button on the right, switch the LED display to output voltage. Rotate the voltage potentiometer onboard until output voltage meets your need. 2) Press button on the right, switch the LED display to output current. Short-connect output terminals of the board (e.g find a relatively thick wire to short the output), rotate the current potentiometer onboard until current on display reaches the pre-set over-current protection. (In other words, of the LED now shows 4A, it means the max current on the board is limited to 4A. When current reaches 4A, red LED indicator on the board will light up). 3) Connect to load and start working. B. Use the board as a battery charger In the beginning, we need to use constant current to charge a battery: an empty battery has a large voltage gap with charger, so the charging current will be high to damage the battery. After charging for some time, at a proper stage, we can switch to constant voltage for charging. (Note: In steps 1 to 4, the input connects to power, the output has no load, does not connect to battery) 1) Find out floating charge voltage and current of battery (If a lithium battery is rated 3.7V/2200mAh, then its floating charge voltage is 4.2V, max charging curreng is 1C/2200mA) 2) No load with the board, switch the LED display to output voltage, adjust voltage potentiometer to the floating charge voltage. 3) Switch the LED display to output current, Short-connect output terminals of the board (e.g find a relatively thick wire to short the output), rotate the current potentiometer onboard until current on display reaches pre-set charging current 4) The default LED-switching-current is 0.1 x charging current (While charging, the current is slowly dropping from constant current to constant voltage. Suppose the charging current is set at 1A, then when charging current is lower than 0.1A, blue LED goes out, and green LED goes on, signifying that charging is finished). 5) Connect to battery and charge. C. Use the board as constant current driver for LED Note: In steps 1-3, the board's input connect to power, the board's output has not load, does not connect to LED. 1) Find out working current and max working voltage of your LED 2) Switch LED display to output voltage, rotate voltage potentiometer until output voltage reaches working voltage of LED; 3) Switch LED display to output current, short-connect output terminals of the board (e.g find a relatively thick wire to short the output), rotate the current potentiometer onboard until current on display reaches pre-set working current of LED. 4) Connect to LED and test run. Shipping All the items to USA will be sent via ePacket (by USPS) with tracking number. Other countries, for total order price below $30 we will ship your item without tracking number. Otherwise, if you need Registered Mail shipping, please add $2.5. Usually all the items will be shipped via Hong Kong Post Airmail or China Post Airmail. If you need other express service: (EMS/DHL/FedEx/UPS), please contact us for the correct price. Your order will be dispatched within 1 (one) business day after the full payment is cleared. Airmail Packets' Delivery Time (reference only): - USA, Australia, New Zealand, Southeast Asia, East Asia. 7-20 business days. - EU (France, Spain, Italy, Germany, UK, etc.) ,Canada,10-25 business days. - Other Countries. 10-30 business days. - Africa, Ukraine, Brazil, Chile, Argentina, Mexico, etc. 15-35 business days, usually long time. Delivery time depends on postal process and other factors, They can get it as fast as 7 days, but it can take as long as 4-7 weeks in some instances. If you do not get your item in reference delivery time, please contact us first through ebay message (Please do NOT open any case), we will reply you as soon as possible (within 24 hours). Please Visit Our Store for More great findings and good bargains!!! Payment We accept payment through PayPal. Return Policy We accept Return for Buyer's any reason, but item must be in "Sealed and Un-used Original Condition." If you already opened or used item, return will be NOT accepted. Shipping is NOT refundable. We will send refund as soon as returned item arrived. If you received wrong item, please let us know to resolve problem. We will exchange to correct item. (In this case, We will pay return shipping.) Everything we sell is 100% guaranteed authentic. We authenticate every item on our site before it is listed. We stand behind the authenticity of our items with a money-back guarantee. We appreciate your trust! Contact US Any query would be highly welcome. Please feel free to drop us a message. We'll reply in 24 hours. Thank You! Merci! Gracias! Danke! ???????!Obrigado! Grazie! ??????????! ?????!Grazie! ??!??!

Condition:	New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. ...	Brand	Unbranded/Generic
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