CTEK XS800 Specification:
    
•  Four step, fully automatic switch mode model for all battery light - old and new.
•  Maintenance pulse charging increases battery life and gives superb performance.
•  The charger can be connected for months.
•  Charges even drained A2 or A1 batteries.
•  Pulse recover of sulphated batteries.
•  Low back current drain, low ripple and input voltage independent (220-240V).
•  High efficiency: 85%
•  Bulk charge rate - 0.8A
•  Current ripple (%) - 2%
•  Back current drain (Ah/month) - <1
•  Dimensions - L142xW51xH36mm
•  Weight - 0.3kg
•  Insulation - Splash and dust-proof
•  Quick coupling to other adapters (not supplied)

The XS 800 has a fully automatic, four step charge:

1. Desulphation
Desulphation with pulsing for sulphated batteries.

2. Bulk charge
Main charge when 80% of charging takes place. The charger delivers a constant current of 1.8 Amps until the terminal voltage has risen to the required level.

3. Absorption
Complete charge up to virtually 100%. The terminal voltage is maintained at the set level. During this phase the current drops successively so the terminal voltage does not become too high. If the absorption phase has been in progress for more than 18 hours the charger switches to maintenance charging. This function prevents damage if the battery is faulty.

4. Maintenance charging - pulse
Maintenance charging. Charging varies between 95% and 100%. The battery receives a pulse when the voltage drops. Keeps the battery in perfect condition when it is not used. The charger can be connected for months at a time.

Low ripple
The XS 800's ripple is only 2%. The battery gains a long service life and there is no risk of damage to lights or flash units connected to the battery. A high current ripple heats the battery and shortens its life. A linear charger has a current ripple of 70 - 400% which is much larger than the maximum 5% for a modern sealed battery. Voltage ripple could harm other equipment, which is connected to the battery.

Temperature
To protect the charger from overheating, the XS 800 is fitted with power limitation. The power reduces when the ambient temperature increases. The power also reduces if the charger were to be covered, which protects the charger from damage. The charger continues to work, but at a lower output. When the ambient temperature drops, the power automatically increases again.