Troubleshooting dead AB ProPac 14 Nickel Cadmium batteries that show no voltage

Gear

ZephyrCan I fly my Alexa or RED on a Zephyr?389

Master SeriesIs a used Master Series rig worth buying as a first big rig?191

BFDHow do I power my BFD receiver from my camera or sled?186

VoltCan I retrofit a Volt onto my existing sled or gimbal?168

ArtemisHow do I power my camera and accessories from an Artemis sled?166

MDRWhere can I mount my Preston MDR on my rig?143

ModulusIs there a Modulus option for HD wireless video?141

G-70Will my G-70 fit my vest, gimbal or sled?126

FI+ZCan I control iris and zoom wirelessly, not just focus?60

HU3Where can I get my HU3 repaired, refurbished or repainted?60

CineLiveHow do I pack and case my CineLive rig for transport?54

G-70XHow does the G-70X compare to Pro Titan, Xarm and other arms?46

Trinity 2Is Trinity 2 SUP 3.0 firmware safe to install or buggy?46

Ultra VestWhich vest should I choose for my body size, comfort and operator type?39

2006Batteries/Power forum

20 years old. Gear and prices may have changed since.

Nickel cadmium batteries that are 15 years old may fail simultaneously or in quick succession
A charger showing voltage when measured with a voltmeter does not guarantee the batteries themselves hold charge
Multiple batteries of the same model can become depleted within days of each other
Switching to rechargeable NiMH battery elements from a different manufacturer can provide a functional replacement if original batteries cannot be restored
Discontinued charger models from the 1980s may not provide optimal charging performance for aged batteries compared to newer interactive chargers

No resolution was definitively confirmed in the thread
The experience with simultaneous battery failure involves only anecdotal reports from a few users
Whether incompatible chargers will damage newer battery models remains untested
No specific recelling services in the mentioned region were recommended or verified