I know with Li-Ion the amperage stays the same, right up until the end of its life, then the Amp Discharge rapidly goes down, But Does a Ni-Cd Battery Chemistry lose its discharge amperage over time? I know that it loses its charge sitting on the shelf, and requires maintenance, but does the Discharge Amps go down as the battery ages?

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    \$\begingroup\$ Your statement about lithium ion is incorrect. Yes, NiCd loses capacity with age; pretty much everything does. One major mechanism in NiCd is electrolyte loss from overcharging, but there are others. No doubt someone will soon chime in with comments on "memory" which is only barely a real thing observed much more rarely than it is talked about... \$\endgroup\$ – Chris Stratton Sep 22 '20 at 22:57
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    \$\begingroup\$ Also "discharge amperage" is not really a meaningful term - it's not very clear if you are talking about capacity or about factors which influence how much power the cell can provide to a load at any given instant (ie, discharge C rating, internal resistance, etc) \$\endgroup\$ – Chris Stratton Sep 22 '20 at 22:59
  • \$\begingroup\$ @ChrisStratton True. But since batteries lose both their energy capacity and max current/power output as they age, the answer to OP's question is yes any way you spin it. Whatever the OP's question is, the answer is that everything about a battery gets worse as it ages. \$\endgroup\$ – DKNguyen Sep 23 '20 at 0:32
  • \$\begingroup\$ Chris Stratton is absolute correct. The most vulnerable component to my knowledge is the electrodes in Li-Ion's, Ni-Cd Battery build crystals which limit their abilities over time \$\endgroup\$ – schnedan Sep 23 '20 at 8:01

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