Have several Sansa Clip MP3 players -- I WISH they would restart production -- SUPERB little players!! I had only one MicroSD card, which I shift between the three 'chip-ready' Clips (I also have 3 early, no-chip version) -- I am VERY carefully babying them all along! Never seen ANY Mp3 player that comes close for excellence! Even though the clip breaks off (I even broke the last couple off on purpose, because I superglue ~3" plastic clothes pins (!) on in place -- last longer, work better!), I would immediately buy more if only Sansa would make more!!So, with several chip-ready Clips -- and their wee old batteries -- rather than swapping chips between two Clips; now I have the next one ready. I actually head out shopping or to meetings or whatever with two clips (in a 'tupperware-like) secure contyainer i Have fit foam in to hold two Clips still and protected) AND External Battery, New Trent iCarrier 12000mAh Portable Dual USB Port External Battery Charger/Power Pack for Smartphones, iPhone 6, Iphone 6 Plus, S5, Nexus 6, Note 4, Tablets, iPad Air 2, iPad mini 3, and more (Now w/Micro-USB charge port) (This is the big brother I only carry when I'm traveling -- when I bought it, it came with a smaller version IMP60D, apparently no longer made.) I carry the power pack and cords for the two different {sigh} ports in the Clips, and one for my USB-C phone in Navitech Dark Blue Handheld Pocket / Portable / Mobile Printer Carrying Case for the HP Sprocket Photo -- and if I'm mid-podcast, I can plug in and carry on.