Bad Odyssey AGM 34/78 fixed!

Rubiconned

Master Procrastinator
Original poster
Supporting Member
Joined
May 30, 2024
Messages
1,109
Location
Bumfuk, Florida
So, I've had the battery for a couple years, but it doesn't have that many charging cycles because I never drove the jeep much. Anyway, earlier this year I didn't drive it for several months and the battery went completely dead. I put it on a charger until it read FULL, and that would crank the engine all day for one day. The next day the battery would be nearly dead. So, I thought do I have a parasitic drain? So, after charging the battery again and driving the jeep for the day, I disconnected the battery ground to eliminate any drain, but the next morning the battery was nearly dead again. Parasitic drain ruled out. So, I noticed this "repair mode" on my battery charger. Last week I let it charge on this mode for 8 hours then switched to regular charging again. This seemed to have fixed it. I drove the jeep 4 days ago and parked it with no disconnected ground and today it started right up. I don't know what the "repair mode" does on these chargers but it seems to have worked. Battery works normally now. Anyone have a similar experience with "repair mode"?
 
My battery "repair mode" includes a trip to Walmart every 5-7 years. 🤫

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Repair mode on a battery charger1234:
  • Breaks down lead crystals to restore the battery’s capacity.
  • Sends a high-voltage pulse through the battery.
  • Can take several hours, depending on the battery’s condition.
  • Used for repairing and storing old, idle, damaged, stratified, or sulfated batteries.
  • Recommended to allow the charger to complete the recovery process.