71 Triumph Daytona Battery Not Charging

[slip101]

My battery is not charging. This started one very humid night. I had to roll start it. The key lamp doesn't come on even after charging the battery and the bike will run for a minuet or so then die. Not sure if it's the alternator, the coils or what. The bike will start off a charged battery as long as I give it gas but wont idle.

[Rex]

If the battery is  not holding a charge then it's knackered. Get it tested by a battery shop to make sure..