3.7 V Lithium Battery Charger Circuit

Eartec Rechargeable 3.7V Lithium-Ion Battery for UltraLITE & HUB Systems

This is a good replacement charger. I use it on MP240, so if you have battery in the compatible list, it will work. Charger is like 2/3 of the original charger in overall size, lightweight and the made seems very sturdy. Good for traveling carry. It provides the information of the battery during the charging time, such as the temporary, battery status, input circuit rate, charged circuit power, and indicates the end of the charge. It can be plugged into any USB charging port for charging, of course, it depends on the output circuit ratio of the USB port, charging time is vary. However, the build-in USB charging cable is very short (like 2.5” only), so this is the only little disappointing part. Price is much cheaper the OEM charger. So it’s recommended.

This lithium battery is very reliable.

The Watson NP-BX1 Lithium-Ion Battery Pack and Charger Kit is perfect as a second backup battery. The charger has an easy to see charge indicator light !

These new V.3 pouches are even better than the V.2. The rain covers are designed much better!

I couldn't find the 3.7 volt version when buying the charger, batteries and tactical flashlight so I mistakenly assumed (I know, I know...)it would charge the 3.7 volt batteries, too. It doesn't now I must buy the 3.7 volt version and am stuck with 2 ea. of the 3 volt batteries w/charger that I don't want or need. but it does charge quick and stays charged, too.

I had no complaints with v.1 but I can notice a (very small) improvement in the finish of v.2. It’s now less rugged which makes the image a little less “blurry”

This little flashlight packs a punch. The secret is in the 3.7 volt/ 2.4Wh 16340 with built in USB micro rechargeable port (on the battery). That battery gives this little flashlight a powerful long lasting bright beam. I'm glad that I purchased two of them. I keep one in my toolbox and the other in my car. Highly recommended.

If you’re looking for a replacement for your Ring Solar Pathway Light button type, 18650 3.7V battery, this it.

I bought this because I purchased a flashlight that will operate on either a AA battery (1.5 volts) or a 14500 battery (3.7 volts) and this battery works very well in this application. It fit in the flashlight just fine and it holds a good charge for a long time. I have only charged it up 2 times since I got it but I am very pleased and I will by again.