Hi, I wanted to bring to the attention of Microsoft of a problem concerning the plugin keyboards, and external batteries using the down port on the surface 2 tablet. It seems that after when the tablet is in suspended mode (sleep), that the internal battery is charged by the keyboard/external battery. This causes unnecessary wear on the keyboard battery. It would make more sense that the tablet stays in suspended mode using the keyboard battery to get it's minimum power draw, and as soon as it gets unplugged, or is too low in charge, switches over to the internal battery; and leaving charging of the internal battery to be done ONLY by an ac charger. This to prevent the keyboard to discharge unnecessarily (as the internal battery can get charged the next time the AC power plugs back in). A second problem is that the keyboard battery is charged BEFORE the internal battery, which also is a software fault or error. It should be the PRIORITY of the charging system to make sure the internal battery is charged FIRST!!! And AFTER the internal battery is charged, let the charging system charge the external battery. This, to prevent the tablet to run out of power as soon as the keyboard is unplugged (this only with battery-equipped keyboards). When the tablet is pretty passive (just browsing internet, watching a low quality movie, typing text, listening to internet radio, or is on standby), it would make more sense to divide the charge between both batteries, and charge internal and external batteries 50/50%. That way, the batteries are charged slower, which is healthier for them, while still the same energy is being transferred to the device (only now divided into 2 batteries). In other words, instead of taking eg: 1 hour to charge each battery, taking 2 hours total, it might be better to have a 50% charge done per hour on each battery. I'm pretty sure both batteries can easily be charged simultaneously when the tablet is in sleep mode.