but not turning on?

My beats pill won't turn on after fully charging it???? The light on the b comes on while charging then it won't turn on at all after done charging we know the speakers and the amplifiers are good and the batteries are holding charge but not turning on????

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 1

crwdns2942205:01crwdne2942205:0:

How do you know that the batteries are holding a charge?

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

crwdns2934285:0crwdne2934285:0