The quality is quite good and clear. Nothing of the informations inside is lost during the digitalizing process
Text excerpt from page 56 (click to view)
KX-TG2551CS
11.3. Charge Circuit
The voltage from the AC is supplied to the main charge circuits. Ultra charge (130 mA on the average) of maximum 6 hours is started soon after the Handset is placed on the base unit. Then it changes to normal charge (75 mA on the average) of 5 hours. Finally the mode changes to trickle charge (30 mA) to prevent overcharging.