So I've taken on the task of upgrading a second generation Ipod Mini with a 512GB Samsung SD card, New Rockbox firmware (did you know you could play Doom on the ipod mini?) and a battery upgrade of 1300mAh... I plan to replace my phone with this (in terms of music playing) as I do not like having a large and rather uncomfortable slab in my pocket that can get destroyed by the roughness of my job.... the Ipod mini is robust especially with the solid state upgrade and fits my wants and needs perfectly aside from one major issue... The batteries I've purchased all seem to drain far too quick and charge rather fast for what i think they should... Why is this? I purchased an INSTEN 1300mAh battery aswell as some unknown brand replacement battery and they seem to give me issues.. Does anyone have any advice? do these batteries need to be "broken in" ? did i purchase duds or fakes? if the later is the case where do i purchase proper 1300mAh batteries? if push comes to shove I will purchase some sort of small 1300mAh Li-Po battery and modify it into the player because I want this thing running for a while... a mere 2 to 3 hours is not quite acceptable from a battery so large... Eventually i plan to also upgrade this thing with bluetooth, I just need to find a module small enough or some sort of device with a very small bluetooth transmitter so i can pop it inside the player, I intend on connecting the module directly to the pins on the audio jack and installing a switch so i can switch between wired and bluetooth devices.