Jul 31, 2019· This is the most common NiCd fast charger of the 1960's through the 1980s because it could be controlled by a simple bimetallic thermostat switch mounted on the battery. Trickle Charging Nickel Batteries In a standby mode you might want to keep a nickel cadmium battery topped up without damaging the battery. Ni Cd Characteristics ,Nickel Cadmium Batteries (Ni-Cd) Ni-cd batteries do emit hydrogen and oxygen gas, products of electrolysis, but there are no corrosive gases as lead acid batteries, so these can be installed near electronic equipment.1. Nickel-Cadmium Batteries. The nickelcadmium battery (NiCd battery or NiCad battery) is a type of rechargeable battery which is developed using nickel oxide hydroxide and metallic cadmium as electrodes. Ni-Cd batteries excel at maintaining voltage and holding charge when not in use.