Vehicle is a four wheel electric scooter for people with disabilities. There are two 12V deep cycle batteries the size of an automotive battery, probably marine type.
Batteries are 3 to 4 years old. 24V charger does its job and when full, it stops charging and lights up a LED. When full, each battery reads 13.x Volts.
Once charged, the status bar on the scooter reads FULL. When riding, the scooter will suddenly stop and flash the status bar as if the battery was empty. If you turn it off then on, you once again see a full battery bar. You then begin riding and within two minutes the same symptom appears.
Is that the sign of bad batteries ? Deep cycles are pretty expensive, so I'd like to have other opinions before replacing them.
Batteries are 3 to 4 years old. 24V charger does its job and when full, it stops charging and lights up a LED. When full, each battery reads 13.x Volts.
Once charged, the status bar on the scooter reads FULL. When riding, the scooter will suddenly stop and flash the status bar as if the battery was empty. If you turn it off then on, you once again see a full battery bar. You then begin riding and within two minutes the same symptom appears.
Is that the sign of bad batteries ? Deep cycles are pretty expensive, so I'd like to have other opinions before replacing them.