Matador
100 kW
- Joined
- Jun 29, 2016
- Messages
- 1,045
Don't use my subary impreza much these days. On september 1st 2019, did a 1000 miles round trip and by then my ammeter showed close to 0 amps (battery fully charged, no current going in). Since then, I only started my car once every one or two week and went for a 15-20 minute ride so the alternator would recharge the battery a bit (at least a surface charge).
I've been lazy for the last two weeks or so and didn't start the car. Last thursday, temps went below -18 C...And friday back to 0°C. But my car would not start. No lights come on the dash. Battery completely dead :?
So took my battery in the house. Checked voltage : 4.86V. I hope it hasn't dipped that low a voltage for more than 2-3 days... and in the cold weather. Thought I'd need to buy a new battery for my dinausor juice fueled car...
I though, why not give the Imax B6 RC charger a shot at it before I buy a new battery... And so I brought it back to minimum voltage of 10.5 V by trying different charge programs at first (LiPo 2S... LiOn...Pb 4S... etc). Then I was able to have minimum voltage to start a PB charge 6S (12V) program... charging slow at first at 2A, then when I reached 12.4V opened circuit voltages (after injecting 8Ah) then charging faster at 4A.
So the Imax B6 says I injected in total 54.5 Ah into the dead battery. This is an Exide Global Extreme 35X 12 V flooded lead acid battery, rated for 700 CA and 585 CCA rated 100 reserve minutes (full, it should run a 25A load for 100 min at 26.7°C until reaching 10.5V, which is about 43 Ah). And at C/20 (2.7A), discharge capacity should be 58Ah...
This battery is manufactured Dec 2016 (3 years old). Now that it reached 13.4V opened circuit voltaged, I put it on a float charger for a few day (Noco Genious G750 charger). Electrolyte levels all look topped off.
Do you think my battery is just worth trowing into recycling, or is there any chances it is still recoverable to put back in my car for another year (or two) ??
Is 4.86V for 2-3 days too far gone ? Has irreversible hard sulfation taken place or just soft charge-reversible sulfation ? What is you experience with this ?
Two years prior I had to buy this battery new because the previous one was also shot, leaving my car in a parking for two month in the suburbs while I was living in Manhattan.
BTW, this is the first time I ever use my SKYRC Imax B6AC v2 charger in Pb mode.
I'll let the Noco Genious G750 intelligent charger finish the maintenance charge and then give the battery a try in a few days to try and crank the car.
Any input appreciated :wink:
Matador
I've been lazy for the last two weeks or so and didn't start the car. Last thursday, temps went below -18 C...And friday back to 0°C. But my car would not start. No lights come on the dash. Battery completely dead :?
So took my battery in the house. Checked voltage : 4.86V. I hope it hasn't dipped that low a voltage for more than 2-3 days... and in the cold weather. Thought I'd need to buy a new battery for my dinausor juice fueled car...
I though, why not give the Imax B6 RC charger a shot at it before I buy a new battery... And so I brought it back to minimum voltage of 10.5 V by trying different charge programs at first (LiPo 2S... LiOn...Pb 4S... etc). Then I was able to have minimum voltage to start a PB charge 6S (12V) program... charging slow at first at 2A, then when I reached 12.4V opened circuit voltages (after injecting 8Ah) then charging faster at 4A.
So the Imax B6 says I injected in total 54.5 Ah into the dead battery. This is an Exide Global Extreme 35X 12 V flooded lead acid battery, rated for 700 CA and 585 CCA rated 100 reserve minutes (full, it should run a 25A load for 100 min at 26.7°C until reaching 10.5V, which is about 43 Ah). And at C/20 (2.7A), discharge capacity should be 58Ah...
This battery is manufactured Dec 2016 (3 years old). Now that it reached 13.4V opened circuit voltaged, I put it on a float charger for a few day (Noco Genious G750 charger). Electrolyte levels all look topped off.
Do you think my battery is just worth trowing into recycling, or is there any chances it is still recoverable to put back in my car for another year (or two) ??
Is 4.86V for 2-3 days too far gone ? Has irreversible hard sulfation taken place or just soft charge-reversible sulfation ? What is you experience with this ?
Two years prior I had to buy this battery new because the previous one was also shot, leaving my car in a parking for two month in the suburbs while I was living in Manhattan.
BTW, this is the first time I ever use my SKYRC Imax B6AC v2 charger in Pb mode.
I'll let the Noco Genious G750 intelligent charger finish the maintenance charge and then give the battery a try in a few days to try and crank the car.
Any input appreciated :wink:
Matador