Nikon battery damage

I have a fairly new spare EN-EL 15 battery which recently suffered water damage. When it had dried out I put it in my camera and got around 300-odd shots before it went flat. I am now unable to charge it - presumably it's dead and should be thrown away?

In early 2015, I had an EN-EL15 that got wet and maybe there was a bit of leakage. I stopped using it. A year later I bought a D500 and then Nikon had this program to exchange old Li-ion01 type EN-EL15 batteries with the Li-ion20 type that works better on the D500. I ended up sending that battery in for exchange.

Nearly all Li-ion batteries contain a monitoring circuit. Among other functions, this circuit will prevent charging if the voltage of a cell falls below a certain threshold. This can happen legitimately through self-discharge. So if a battery has lain unused for a considerable time, it may become unusable simply because the 'safety' circuit prevents it from being recharged.

 

I suspect the water-damaged battery still contains perfectly good (and hermetically sealed) cells. However the monitoring circuit itself may have been damaged, or the water has created a discharge path that's taken the cells below their charging limit.

 

It is possible to revive such a battery by supplying current to the cells, bypassing the monitoring circuit, until the cell's voltage rises above the arbitrary cutoff threshold.

Obviously, this can only be done by opening the battery casing. This may be worthwhile if the battery is of high value, or, like the cells in PDAs or GPS units, difficult to obtain a replacement for.

 

Just FYI.

Thank you for your responses - the local Battery Factory is attempting to recharge my battery.

Don't throw away lithium batteries, recycle them. I take my old Li-on batteries to Lowe's.