Complex sentence: This method is often used with nickel-cadmium cells which have a large drop in voltage at full charge but the voltage drop is much less pronounced for NiMH and can be non-existent at low charge rates, which can make the approach unreliable.
Split into simpler sentences: This method is often used with nickel-cadmium cells which have a large drop in voltage at full charge. However, the voltage drop is much less pronounced for NiMH and can be non-existent at low charge rates, which can make the approach unreliable.