Magnetic Charger is to only be used with compatible Lithium Ion Cells upto 4.2v like 18650 / 21700 / 26650 & tons more!
The smart charger is bi directions and will sense the polarity poles of the cell.
2 Amazing Key Features
- The pass through USB on the charger can be used to charger your phone when using a quality Lithium Ion Cell ( Samsung 30Q ) and you phone cable! Output is 5V upto 1A!
- Can charge your batteries with a portable solar panel with 5v output
Standby Mode: The light on the charger will be flashing red when plugged into a USB wall outlet with no load / battery not connected
1. When charging: light on the charger will flash red / blue after 3 seconds
2. When done charging: light on the charger will go to solid red.
- Charging rate will slow down as the battery charge approches full, to maximize the lifespan of the battery
Side Note : This charger doesn't work on all cells depending on if the cell has a recessed button top or protected circuit chip. Also if using some smaller cells they might need a spacer so the contacts fully engage.
Legal Note : Dont ever use standard AAA/AA/C/D cells or NIMH with this charger! Always charge in a safe dry location between 40F-90F. Dont leave the charger unattended & always use responsibly!
Great little device that I will frequently be using to charge all my batteries. Don’t be left in the dark! This is a must have item......
The instructions say that the charger will flash red when plugged into a USB port and then flash blue/red 3 seconds after connecting to a battery, ending at constant red when charging is complete. Mine flashes blue/red 3 seconds after plugging it into the USB port, it doesn't care if there is a battery anywhere nearby so I have no way to know if it really is connected and charging. Having just 'tested' mine on what I thought was a reasonably charged battery, it did change to solid red (full charge) after 2 1/2 hours, so it was charging. The magnetic attachment and not having to think about battery polarity are both pretty handy. The wires are short, 10" from plug to connections.
Nice, easy, & compact way of charging batteries for lights, etc but a slick way to use those batteries to charge your phone when usual methods are unable. Inexpensive peace of mind.
Works very well, using it to charge my 18650 lithium ion batteries. The Smart charger is only to be use with lithium ion batteries rated up to 4.2 volts. Because of the short power cord, be sure to use an outlet that is by a counter top. To rest the charger and battery on. Otherwise it will be dangling down from the outlet potentially putting stress on the power cord plug/cable end.