Simple nicad battery charger circuit by little part - ElecCircuit
Nickel Cadmium NiCd Battery Charger Circuit
What is the NICD liquid battery charging voltage for the first time on site (note: the charger uses constant current method)? - Quora
EBL Smart Battery Charger for C D AA AAA 9V Ni-MH Ni-CD Rechargeable Batteries with Discharge Function & LCD Display: Amazon.com: Tools & Home Improvement