Question about Bosch Home & Garden Akkupack GBA 36V (1x4,0Ah)

Oh man, a few weeks ago I asked here why this battery is practically the same price as the version that includes the charger. To avoid electrical waste, I ordered without the charger. Today I put it into the charger and nothing happens. Not even an LED comes on. Tried with old battery, same effect. The charger has only been on the ground floor shelf for six months over the winter. Now I'll probably have to buy a new one separately...