Impres PMNN4491A Recondition cycle

[KI5EDJ]

Good day. I received a battery that was "bad" in a secondhand sale. I knew from the outset it wouldn't charge.
Yesterday I put it on my own impres charger at the house, flashing red. I used a small variable power supply to put 10 volts to the upper terminals, electrically parallel to the battery at roughly .1 amps for 2-3 minutes. I believe this ran the battery's control circuit long enough to allow it to begin charging. The cell itself had discharged to around 5 volts. Still flashing red so I got up for a few minutes, yakked with the wife, showered, etc. When I came back the LED was solid red. I pulled it off the charger and was able to power up the radio it came with. I put it back on charge, this morning the light was green but an identical radio said "Recondition Battery". No problem, I have an impres charger here at work, so in the battery went.
It's gone from yellow to red back to yellow.
I wonder is it normal to switch back and forth like that? If I take it from this charger to my charger at home will it continue to recondition or will that mess up the process?

 

[K2NEC]

It's not normal to go from recond to red back to recond but I'd be remiss if I wasn't in your exact situation and had a battery or 2 do that. I let it do the recondition cycle, usually overnight, and then got up in the morning and it went back to orange. I just let it do it's thing and usually after the second recondition cycle it fully charges.

 

[KI5EDJ]

I went back to work and picked up the battery later on. The charger was flashing red/green. One of my radios says it has 36% of it's service life left.
That's 36% of a spare battery I didn't have before.

 

[K2NEC]

That will last a couple of hours at best. Anything below like 70% is pretty useless imo