The type of advice that 99% of HN commenters would be able to do properly…but that last 1% … I hope they don’t cause the battery to blow up when they try to open it up in just the wrong way!

Still though, could be a lot of screwing around needed to get this to work. Likely the extra wires go straight to a chip which expects to be able to monitor the voltage of the battery, and which might be alarmed by a power supply that acts unnaturally for a battery.