Hi.
A gadget that uses series of 12 x AA Ni-Cd cells has a missing charger. Looking at the charger on the web reveals no specs.
Is it reasonable to choose a supply limited to 18V DC unloaded and capable of 200mA to recharge such pack ?
If the charger is external, then you need a charger - not just just a PSU. If the device has an internal charger, then you need a supply that provides what it expects.
Thanks. Yes, the charger is external. The post is about using some sort of supply to recharge the pack as equally well as possible as the missing charger of unknown specs.
Ni-CAD cells are old. I replaced mine with Ni-MH cells 25 years ago.
Ni-CAD cells can be charged continuously at 1/10th the mAh rate but it will take a long time.
1.5V will be good but you must limit the over-charging current to 1/10th the mAh rate.