I have a working AA-USB charger. It has a wide range of working vIn, from 2.2-4.5v, but it only delivers high current at high voltage, so I have to use three AA's. They're rechargeable NiMH's. It's not good to discharge a rechargeable battery below 1 volt. With 3 batteries, this means a vIn of 3v.
Hey guys I'm a first time poster with little EE experience. I recently assembled a pulsing LED circuit using the schematic below. I added four more LED lights (wired in parallel) and tried to power the circuit using four AA (NiMh) rechargeable batteries (wired in series) but the batteries don't provide enough voltage.
Hi all. I'm relatively new to electronics so looking for some advice on a rechargeable inspection lamp I want to make. I have ordered 5 1w high power LED's and 20mm heatsinks and will design around these.
I need help to decide on a battery and how to recharge it.
The LEDs are 1.2w 130lm 350ma 3-3.2v. I need about 3hours useage from a charge minimum.
All input welcome.
A couple of months ago, Patriot Memory released the Fuel+, a complete line of mobile rechargeable batteries. There are six models to choose from ranging from 1,500 mAh all the way up to 9,000 mAh. Although I had a chance to play with the Fuel+ 3000 and Fuel+ 6000, I am going to concentrate this review on the Fuel+ 9000.