TRACS battery charger
From Northern Lights Tactical Wiki
Standard TRACS Robots use a 24-volt sealed lead-acid battery and therefore require a 24-volt smart charger. These chargers are fully automatic. They charge the battery as well as maintain the charge after primary charging is completed.
Charge time can be as long as 3-4 hours.
The charge will also sense a faulty battery if the pack voltage is below 18 volts. In this case, it will not attempt to charge and a replacement battery will be needed.