John said:
Whatever the **** "gone duff" is supposed to mean...
It is a technical engineering term. You would not understand.
Typically the weakest cell fails and then the anti-self destruct
mechanism stops the whole thing from being recharged. Officially no user
serviceable parts in the multicell units. And the anti self-immolation
circuit isn't entirely foolproof there have been a few go up.
The energy density in a fully charged battery is fairly nasty. Even a
humble AA when shorted can source well in excess of 10A until it explodes.
Hundreds of millions of consumers thoroughly enjoy lithium-ion
batteries, Fuckhead, that is why their use is EXTREMELY widespread.
And I expect they replace them about every 3-4 years. It is very
difficult to make a deep discharge high power battery that is robust in
regular use and with a sensible power to weight ratio.
Regards,
Martin Brown