TN267 1-4 Cells Li-Po/Li-Fe Balance Charger and Lipo Charging Bag for Airsoft & RC Car Battery Packs with 1S to 4S XH Type Balance Connector

There is a better description of the product on the manufactures website: [...] WARNING: I'm not really using this as it was intended, so deviate from the manufactures specifications at your own risk. I am using this as a charger for a homemade LI-ion battery pack. It's got 30 18600 cells (3 series 10 parallel) which I am using to power a raspberry pi project I am currently working on. It's very small and light weight so I was able to attach it directly to my project, so if I want to charge the battery pack I just plug the included power supply into the side and it starts right up and turns off when it's done. I didn't have the correct plug to plug into one of the 4 ports on the side, but i just glued 4 male to female jumper wires together to create a detachable plug for it. It will start blinking red if you plug the battery pack in wrong, which I have done, but try not to do that. The 4 output plugs are all connected to the same charging circuit, so do NOT plug more than one battery pack in at one time, especially ones that have a different number of series cells(7.4v battery in the second port and a 11.1v battery into the third). It may work in that configuration, but it will be extremely hard on the balancing circuitry and it will also not charge very fast. As far as the description is concerned, i'm not sure what they mean by "aluminum alloy" but it's definitely plastic painted to look like aluminum. Other than that the charger works great, it charges exactly as expected: 1A bulk charge at about 4.6V per cell till it's mostly charged then the voltage slowly drops to 4.2V as the current slowly drops to 0 at which point it is done charging and the green light turns on. It does get warm(not hot) while charging, especially with a big battery pack like mine but it's not much of a concern. You still probably shouldn't leave it unattended not because this is a bad charger, but because Li-ion batteries are very temperamental and even when charged correctly can cause fires. I had to replace 2 of my cells because they started refusing to charge and instead were attempting to dissipated all the charging energy as heat.

Works great, best charger 100%

Dose the trick, charges really fast!

Works well, has a good failsafe (previous charger I bought at this price point caught on fire, this one is much more reliable) good for recreational charging of small batteries for rc cars/planes/robots. Can’t recommend for any type of competitive use (robot fighting) as it takes a very long time to charge even small 500mah or less batteries. That said it is a safe and easy to use charger that I would trust to walk away from for 15 minutes and not expect the house to burn down.

Seems to work well, i've used it to charge a 4s and a 2s battery (not at the same time). Somewhat slow charging given its a 1C charger, but likely the safest for the battery. Came with a wall charger. Had a drone propellar destroy the balance charger on a battery, and when re-wiring it I placed one of the lines in the wrong spot, the reverse polarity protection worked well and flashed green/red until I broke out a voltmeter to further check and when realigned it worked well. Gets slightly warm with use, but works well for the price.