If installed correctly, this is a super-simple upgrade. Installation was quick & easy. I took an existing 65mm Acrobee BL & swapped everything over to 75mm cockroach frame & converted it to a 2S whoop with this series cable. It's really great not having to buy all new lipos of a different size to keep of with; just use the same 1S lipos I already had. More punch & a bit longer flight times right out of the gate.
The wires shorted and almost caught my batteries on fire.
I went to plug it in like normal. With a new cable cause I bought two in case one broke.
When I plugged it in, the batteries started quickly becoming really hot. Luckily I quickly unplugged it but by the time I got it apart north pH connectors attached to the batteries had melted into an unusable state.
Warning to other users.
tried this with 2 1s batteries in the 65mm acrobee. worked but shorted a lot. it was hard to keep a constant connection. The female plugs don't connect well. the batteries I use connect reliably with the single ph2.0 that's prewired to the beebrain but not with the pigtail i'm afraid. still trying to figure out a solution.