The stated values are approximate only; they may vary depending on the state of the battery being charged, temperature etc.
1)
When powered by a mains PSU, the charger will only operate correctly if the PSU is suitable in terms of voltage, stability, maximum load capacity etc. You can avoid problems by using only the PSUs
which we specifically recommend.
Operating Manual GM COMMANDER FUN
100 mA to 5 A / max. 50 W with internal power supply 100~240 V AC or 11...18 V DC power
100 mA to 1 A / max. 5 W with internal power supply 100~240 V AC or 11...18 V DC power