Of course, one of the most important things to consider when buying a handheld device is just how long it will go before you need to go find a power outlet to charge it up again. So, this is the topic to discuss the battery life of the 3DS. At E3, Nintendo stated that they aim to keep it comparable to the DSi's, but they didn't make it clear if this took the much-discussed tag mode into account or not. FYI, the DSi topped out at 9-14 hours on its lowest brightness setting. At a comparable brightness setting, I believe the 3DS's battery life will be as follows: 11-12 hours w/ tag mode off 5-8 hours w/ tag mode on 3-4 days in sleep mode (read: closed and with the screens off) w/tag mode on Again, these are just my personal estimates. What are your thoughts on the 3DS's battery?