The user mentioned that the charger can charge the battery for a couple of days without worrying about overcharging as the maximum charge current is only 1000 milliamps (1 amp).
The user mentioned that the charger has a charging rate of 1amp, which is between his other chargers of 750mA and 1.25amp.
The reviewer mentioned that the charger can charge a discharged battery fairly quickly (5-20 hours depending on battery size and how dead it is) at a rate of 1-amp-hour. This shows that the user has used the charger and has faced this problem personally. Thus, it can be said that user has commeted that based on his experience. So, it is experience-rich snippet.