Being diligent about storing it properly may have preserved the mechanical parts but hurt the battery. If you store a rechargeable battery long time the second worst thing you can do is keeping the battery fully charged, greatly increasing the rate of detoriation. The only thing even worse would be to leave the battery fully discharched as it would eventually go into a deep discharge destroying it. For long term storage you should keep batteries about 60% charged.
???
That’s exactly what he did, because that’s what the manual for the bike suggested. Stored the batteries at 60% charge in a cool basement, checked on them and re-charged every 6 months as needed.
Sorry, but I’ve just seen way too many people that just keep the charger permanently attached, forcing the battery to stay at 100%, so I assume that happened here, too. Unless you do something harmful to it, the primary limiting factor of a lithium battery is the number of charge cycles, so I assumed something must have happened to the batteries so they degrade to such a minuscule range after being in use for just 2 years.
Being diligent about storing it properly may have preserved the mechanical parts but hurt the battery. If you store a rechargeable battery long time the second worst thing you can do is keeping the battery fully charged, greatly increasing the rate of detoriation. The only thing even worse would be to leave the battery fully discharched as it would eventually go into a deep discharge destroying it. For long term storage you should keep batteries about 60% charged.
???
That’s exactly what he did, because that’s what the manual for the bike suggested. Stored the batteries at 60% charge in a cool basement, checked on them and re-charged every 6 months as needed.
Sorry, but I’ve just seen way too many people that just keep the charger permanently attached, forcing the battery to stay at 100%, so I assume that happened here, too. Unless you do something harmful to it, the primary limiting factor of a lithium battery is the number of charge cycles, so I assumed something must have happened to the batteries so they degrade to such a minuscule range after being in use for just 2 years.