I bought a Jungheinrich EFG 115 forklift with SLT 100 battery charger
The products are practically new but are around 10 years old (very rarely used).
I tried to recharge, but on the charger a yellow LED lights up indicating "wrong battery voltage".
It probably means that there is a problem of battery undervoltage (very low).
If I turn the elevator key the panel turns on.
What can I / should I do to top up?
Thank you.