XK-5 MacBook Pro Charger for the 15 and 17 inch battery.
- The XK-5 has the ability to charge up batteries five at a time. You are able to have batteries ready for any classroom/student during the day. Turn it on (switch is in the back) and put the batteries in the front bays. Charge away. Flashing green is charging, solid green means the battery is charged.
- A completely drained battery will take approximately 1 hour to recharge.
- The XK-5 will calibrate the battery which makes the fuel gauge in the menu bar accurate. As the battery ages, it does not hold as much of a charge as when the battery is new. The PMU (power management unit) in the MacBook knows only the original "state of charge" until the battery is re-calibrated to the current "state of charge". When the MacBook battery needs to be calibrated, there is an amber LED which will alert you when calibration is necessary. The bottom 2 bays are charging/calibration bays.
- "Wake Up" feature . A small battery charge is necessary to dialogue with the charging circuit in the laptop. You may have a good battery that appears dead to the MacBook charging circuit. It is possible that it has only fallen below the minimum voltage of 2.8 volts per cell. When the XK-5 reads a dead battery, a small current (500 mamps) is applied for 5 minutes attempting to put a charge into the dead battery. If the battery voltage can be raised, then the charging circuit can start to work. This can possibly revive batteries which appear dead after a long recess.
- The all aluminum chassis is made by Brydenscot Metal Products. The small footprint makes it easy to fit on a shelf. Measurements are 9.5 inches wide x 9.5 inches high x 9.75 inches deep. 90-240 VAC input. We can provide the ac cord for your country. For example, we have shipped to UK, Germany, Australia, Columbia.
- 3 year warranty.
Email for a quote. Fax PO's to: 415 946-4099
Why calibration by Mitch Scheffler.