electrolyte
Newly Enlightened
- Joined
- Jan 4, 2019
- Messages
- 61
I have a laboratory freezer (ultralow cascade) that was built in 1996 and the design might go back a couple of years before that. There is a battery pack for the failure alarm to keep that part working long enough send out a distress call in case of main power fail. Battery pack itself has no immediately useful markings on the outside of the wrap or on the tab cells themselves.
My faulty memory tells me that this was a time when both battery types were in wide use. That would probably not be a reliable indicator anyway. Is there any good way to determine if they are NiCad or NiMH? It is a flat, three-cell solder tab pack with two leads n a plug. The only information that I see printed on the pack besides warnings for recycling and disposal are 329C and SL120. I see additional info for voltage (3.6) and 800 mAh rating and I see a reference to "Dryseal".
Is there any reasonable way to determine what chemistry this is? I was thinking maybe density (weight). Note that the batteries have been abused (stored dead) and the onboard battery charger/monitor indicates that it is dead so no functional testing is likely possible.
My faulty memory tells me that this was a time when both battery types were in wide use. That would probably not be a reliable indicator anyway. Is there any good way to determine if they are NiCad or NiMH? It is a flat, three-cell solder tab pack with two leads n a plug. The only information that I see printed on the pack besides warnings for recycling and disposal are 329C and SL120. I see additional info for voltage (3.6) and 800 mAh rating and I see a reference to "Dryseal".
Is there any reasonable way to determine what chemistry this is? I was thinking maybe density (weight). Note that the batteries have been abused (stored dead) and the onboard battery charger/monitor indicates that it is dead so no functional testing is likely possible.