At the same time I found one Makita charger DC1414T. The question popped up: how to charge Black and Decker battery by Makita charger?
Here is the drill itself:
Here is the Makita charger, with spec. from 9,6 V up to 14,4 NiMH / NiCD batteries:
Here are some pictures of the Black and Decker battery. While googling it seems like that this is compatible with DeWalt batteries as well. There are only 3 terminals on this battery. After partial disassembling I found out interesting thing. The third terminal is ground (-) of 1/2 of the battery pack and NOT any thermistor as it was mentioned on some forums.
I've tried first to connect battery and charger simple way : positive to positive and negative to negative. Just to see if Makita charger would deal with it. However, the charger detected battery "temperature problem" and it wasn't charging. So, I had to cheat the charger to start charging. Thermistor is a safety part - it will stop charging if the temperature is too high. BUT, can not be that big issue if Black and Decker doesn't have such a feature at all.
I got original Makita battery pack and measured the resistance between thermistor and negative terminal at room temperature and right after charging (warm battery).
Here is a picture of battery schematic including measured values of thermistor.
So, final solution was to fake the thermistor by a fixed resistance in order to cheat the charger. I have used constant resistor of 16 kohm. Here is the final solution and yes! it's charging! (red light blinking)
Conclusion: The best is to have any charger for 9,6 - 18 V for NiMH/NiCd batteries. It's possible to charge ANY type of NiMH/NiCd battery pack using some cables and crocodile clamps. Of course, I'll modify the charger later on by soldering cables inside and make some more "comfortable" connections + clear marking of the terminals.
Based on a request I made also schematic to show connections between battery and charger (it is simple):
PS: Be extremely careful to not cross-connect some terminals, you can damage charger or battery or both.