Some lipo repair work.
I had two 6-cell lipo batteries for my blaster. First one died completely and it turned out it had 2 dead cells. The other one worked but kept running out of juice way too early. After measuring the cells I discowered it had one cell that didn't hold capacity very well. It ran out while the other ones were still at 80% capacity.
I stripped the batteries, removed the 2 dead cells and combined the remaining best cells to one 6-cell battery. Covered it with black duct tape. :D
The red bubblewrap contains the remaining good (and not so good, but working) cells which I plan to keep as spare parts.
If you attempt to repair lipos like this, always use tape and cover the contacts you are not soldering, and solder one at a time. I did so and even then sparks flew when the soldering iron slipped few times.