Well there was another issue that started first, one cell reading low, but yes I found on some hotcigs the jst pins were soldered shorter on the board then others. It looked like hotcig started having problems with the short pins and changed how they were making them. The short pins made it hard for the battery jst to make a good connection, they started soldering them on farther out from the board and they put spacers under the plastic jst body on the board, I resoldered the mods I had with the shorter pins.
But if cigatron has all cells showing low, it may be another issue. Still, if it was me I'd make sure the pins were soldered on longer and fix it if they weren't. I had a few posts with better descriptions and pics earlier in this thread, I'll try to find them and post links. When I lost a hard drive a couple weeks ago I lost a lot of those pics along with a lot of other important files.