A good friend, colleague, philosopher, and programmer once told meas we
were leaving yet another interminable "Lessons Learned" meeting for yet
another troubled project: "The problem with Lessons Learned is that
theyrarely are."
I brought up my experience because it happened on discharge and the
thread had focused on the charge cycle. It may have just been defective.
Good lithium chemistry batteries tend to have very flat discharge
curves, and because of extremely low internal resistance, can deliver
massive amounts of energy with little voltage sag. A lesson from my
experience might be, "Never put a lithium<mumble> battery inside your
radio."
To avoid rapid discharge of your bank account with no return, avoid the
really inexpensive [as in cheap] Li-<whatever> batteries available on
line from unknown off-shore sources. I fell for onealleged 10 Ah
Li-ion. It may have stored 10 Ah of energy, however its discharge curve
resembled the glide angle of a brick and I was lucky to get 1 to 1.5 Ah
out before the voltage fell to cutoff on my K2. Iwill tire of operating
with my K2 well before depleting my 4S1P A123 LiFePO4.
73,
Fred ("Skip") K6DGW
Sparks NV USA
Washoe County DM09dn
On 5/18/2017 2:47 PM, Ron D'Eau Claire wrote:
Ouch, Fred!
One of the standard airline emergency procedures for a smoking/burning/fizzing
phone or other personal electronics is to submerge it in water or wrap wet
towels around it to reduce the temperature and keep it from igniting nearby
flammable materials.
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