I recently replaced the cells in my ebike which consisted of 20 Ni-CD Size D (1.2V) 4,000mAh with 20 Ni-Mh Size D (1.2V) 10,000mAh batteries.
Before installation, I charged up each battery to ensure it was working, and connected the cells exactly how the old cells were connected. I tested the battery on the bike and it ran beautifully.
However, when it came to charging the battery, it simply would not charge. I can confirm the charger was working with the previous cells, but since I’ve changed them, the charger only shows a green led. The charger that I am using is rated for Ni-Mh batteries and is 24v 1.8A.
Are some built in protections preventing it from charging and is there anything I could do to get it charging again? I was looking at various chargers online with a similar rating but am unsure if i purchase one, if the same issue would arise.