Innovateking 2S 7.4V LiPo Parallel Charging Board JST-PH2.0 3-Pin 4.0mm Banana Plug 2S LiPo Battery Charge Board for Balance Charger Imax B6 etc

It charges all the batteries at 1 time! No issues so far, I've used it over a year now.

This works great. I use it for my Umx Timber batteries, I can charge as many batteries I want. Add the appropriate C-rating for charging, my batts are 280mA 2s. So if charging 2 batts I set 2s and .6 amps. If charging 3 batts I set .9 amps. 4 batts 1.2 amps and so on. Important!! The batteries have to be close in charge state. Charging a dead battery along with a almost full battery is not good when parallel charging. Make sure all the batteries are the same size and at about the same charged state. An example would be that all batteries have been discharged after flying for about the same amount of time. This unusually puts the individual lipo cell voltages at 3.7 volts. Don't charge a batt with cells at 3.7 volts and another at 4.1 volts, that's too much difference. Yes, you can also charge one battery at a time as well.

This is a pretty niche product for a connector used on relatively uncommon batteries. Most balance leads are JST-XH whereas this is designed for batteries with JST-PH2.0 balance / power leads. This is the same size as the newer TinyWhoop connector or "PowerWhoop" but in a *2S* variant. I use these batteries for little indoor quadcopters like the HoverBot because they're so much lighter than anything in the same class. Anyways... this product is exactly as describe and seems to be really high quality / feels durable. I had to snip off the banana plugs and add an XT60 connector to use it with my charger, but that's my issue. This is much nicer, i think, than the (x6) parrallel charging harness available from hobbyking (the gauge wire on that product is really small. Keep in mind that if your charger doesn't have a balance plug big enough for 6S, you'll need to swap out the JST-XH balance plug for something else. To be clear though, the balance plug that comes off this product and plugs into your charger is the standard JST-XH plug.

Like that it charged my battery quick

This product is great!! I have recently used this charging board and it works fantastic!!. The two batteries that I bought it for I charged at the same time and they both charged fully. Each cell from each pack was charged within .1 volt of each other. A very good product!! Would recommend it to anyone. 😁

This is a total waste of money. It will not fit a standard battery for an axial scx24. Not well made

I have two small RC planes that use 2S 7.4V LiPo. The batteries last for about 5 min per flight. I Can charge all my batteries at the same time. Which gives me more flying time than I want without waiting for the next battery to charge. So far it works great. All the batteries charge together and frees up my charger for the bigger batteries. It plug into the charger just like it is larger battery.

Wrong / mixed polarization but possible to fix it yes.