I use this hack i a citroen c1 EVie electric car.
The ctek xs 3600 have 4 charge modes:
- Desulphation: pulses with high volt/amp is made
- Bulk: after 80% charge, the charger deliver a constant current until battery i fully charged
- Absorpsion: charge up to 100%, current will fall but the voltage will be constant
- Puls: this is a puls charge mode, it maintenace the battery, a keep it in goog condition. This mode charge between 95% and 100%. This is the mode used when charger is connected in months.