I always balance charge and charge as slow as time permits- general never in a hurry. I don't like leaving batteries in situ incase of a small current drain.

In my 5yrs if charged as specified etc never a problem but hiding by some of HKs customer service I doubt they would rebuild my house if they sold me a faulty pack so why take the risk when some practical low tech and low cost solutions are available?!

(old metal filling case, old pot an some sand?!!)