Spinner charging is a dark art. You need good Karma and to have lived a clean life.
They are probably the worst battery every made for charging...
(however....)
What many people won't know is that using a standard 510 eGo USB charger, the Spinner reads as fully charged
before it is fully charged.
You charge it... it reads green. BUT it's not really charged.
SO - You unplug it and do it all over again... and guess what, it turns red and then it finishes charging properly.
This sounds like BS, but I kid you not. You have to charge them twice, sometimes three times to get them properly charged.
Try it.