Charging 7S

[_paralyzed_]

They show the adapter as in stock at hobby king, but there was some weird glitch, whenever I clicked the thumbnail of the item it went to the battery accessory screen rather than the add to cart screen. I found the adapter by googling the battery> going to the battery page> the adapter was in the "related products" section of the battery page. Anyhoo, here's a vid of the adapter. Looks like you need an 8s male plug, not a 6s, and female 4s and 3s plugs. Vid>

[_paralyzed_]

read the comments on the youtube vids and bust out the voltmeter!

Establish ground and probe the pins, then arrange into the new plug in ascending order. It's a pretty simple plug.

You have an 8s capable charger, so a standard 8s plug is the easiest for you to use. (just leave one pin unused)

[_paralyzed_]

I see the problem!

If you look at the still of the video of the adapter, you see the 3s plug only has 3 wires- it should have 4 wires- ground and cells 1,2 and 3.

The 4s plug has 5 wires, and should only have 4 wires- the positive voltages of cells 4,5,6 and 7. Ground is shared and only necessary on the first plug for our new 8s end. The 4s plug should omit the ground wire.

Hobbyking really fudged up that adapter.

[pinkpanda3310]

Originally Posted by _paralyzed_

Hobbyking really fudged up that adapter.

If that wire is not needed for series charging then they haven't really fudged it up then. They've made it so the correct wire gets left out. Each tap can still be used on a stand alone balancer if needed.

What I am worried about is which tap from the battery pack goes first

[_paralyzed_]

Originally Posted by pinkpanda3310

If that wire is not needed for series charging then they haven't really fudged it up then. They've made it so the correct wire gets left out. Each tap can still be used on a stand alone balancer if needed.

What I am worried about is which tap from the battery pack goes first

It's not the correct wire getting left out though, they are tapping into both grounds and thats no good. It should only be one ground going into the charger. My description above explains it.

A simple use of the voltmeter will show polarity and which lead goes where.

[_paralyzed_]

I assumed the black wire was the negative. If I'm wrong on that assumption everything I've said is hogwash. Consult your voltmeter!

[pinkpanda3310]

I was just thinking you may need to be careful which balance tap goes to the positive end of the balance port. Is it indicated on the battery pack some how?