0478 131 8327 B - EN
18
8.1 General
The RMA 339, RMA 339 C lawn mowers 
are operated with rechargeable STIHL AK 
type lithium-ion batteries only.
The batteries supplied are optimally 
adapted to the intended purpose, 
however, all STIHL AK type batteries can 
be used.
The lawn mower electronics exchange 
data with the installed battery and adapt 
the power of the electric motor to the 
relevant capacity.
8.2 Connecting the charger to the 
mains
● Insert mains plug (1) in socket (2).
● After connection of the charger to the 
power supply, a self-test is performed. 
During this process, LED (3) on the 
charger illuminates green for approx. 
1 second, then red and then 
extinguishes again (Ö 8.6).
8.3 Removing/inserting the battery
● Remove the safety plug 
(Ö 9.2) and hold the battery 
compartment cover in the 
open position.
Removing the battery:
● Push locking lever (1) towards the 
battery and remove battery (2) 
upwards.
8. Battery and charger