AC DC Adaptor fail

Mission accomplished. Restored the 027 battery to max CCA. I varied the amperage from 35mA to 45mA, with voltage constant at 32.44v. 45mA produced enough bubbles for me to not like. But the slightly over-powered charging could be a necessary evil.

Battery state after resting for 2 days:
12.86V stand alone
3.99 m-Ohm internal resistance
100% wear life
650 CCA, Spec: 600 CCA, type 027

What remains unaccomplished is to charge the battery to 16v. It's a mystery how the 23v max, 6w max china solar panel did it. I believe 16v is beneficial even though I can restore batteries without getting to that voltage level.
 
Time for another battery revival. Reduced sunlight meant that a 4.5w up to 23v non-optimally placed solar panel was not able to sustain the battery at this time of the year. The car sat undriven for 3-6 months.

Battery state
10.17v stand alone
72.84 m-Ohm internal resistance
1% wear life
35 CCA - runs a micra alarm system and locks, but unable to start engine
Spec: Lion 063 40Ah EN 340CCA, very old

Charger configuration
26mA effective charge current
1.5w mains draw
32.5v open circuit
36mA open circuit
 
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Battery state
12.3v stand alone
12.46v connected to charger
36.49 m-Ohm internal resistance
3% wear life (assuming 380cca max capacity)
71 CCA
Spec: Lion 063 40Ah EN 340CCA, very old

Charger state (no adjustment made from previous)
22.?mA effective charge current
1.5w mains draw
31.5v open circuit
 
Battery state
12.37v stand alone
12.47v connected to charger
15.32 m-Ohm internal resistance
20% wear life (assuming 375cca max capacity)
168 CCA
Spec: Lion 063 40Ah EN 340CCA, very old

Charger state (no adjustment made from previous)
20mA effective charge current
1.5w mains draw
29mA open circuit
 
Battery state
12.37v stand alone
12.48v connected to charger
14.05 m-Ohm internal resistance
24% wear life (based on 340EN 374CCA, conversion table: https://attachments.priuschat.com/attachment-files/2015/09/94760_EN_CCA.pdf)
184 CCA
Spec: Lion 063 40Ah EN 340CCA, very old

Charger state (no adjustment made from previous)
20mA effective charge current
1.5w mains draw
31v open circuit
31mA open circuit
 
bernardgreen said:
It looks like DNJ has discovered ( or maybe even invented ) wireless electricity ( electrickery )
Click to expand...
Things have changed since you were a school boy. Nowadays, people can do almost magical stuff with china gear. Here's a slightly similar unit to the charger I am using. Mine is shown in the earlier part of the thread.

 
Jesus wept.

I only read two pages of this thread. I feel like I have been (temporarily) possessed by someone that walks the streets in their slippers and shouts at pigeons/small children/windmills/etc.
 
Battery state
12.38v stand alone
12.49v connected to charger
13.73 m-Ohm internal resistance
25% wear life (based on 340EN 374CCA)
189 CCA
Spec: Lion 063 40Ah EN 340CCA, very old

Charger state (no adjustment made from previous)
19mA effective charge current
1.5w mains draw
30v open circuit
29mA open circuit
 
Battery state
12.41v stand alone
12.5v connected to charger
13.48 m-Ohm internal resistance
26% wear life (based on 340EN 374CCA)
192 CCA
Spec: Lion 063 40Ah EN 340CCA, very old

Charger state (no adjustment made from previous)
20mA effective charge current
1.5w mains draw
30v open circuit
29mA open circuit
 
The charging slowed to a steady crawl. This is expected given the low charging current. At 20mA, there is no gassing/bubbling, and this is desirable because sealed batteries can't be topped up with water. Also, I don't need to use the battery. Therefore slow charging isn't a problem. I will take weekly reading instead. Given the low stand-alone voltage, there's plenty of capacity remaining for the battery to accept charging.

Battery state
12.42v stand alone
12.52v connected to charger
13.27 m-Ohm internal resistance
27% wear life (based on 340EN 374CCA)
195 CCA
Spec: Lion 063 40Ah EN 340CCA, very old

Charger state (no adjustment made from previous)
20mA effective charge current
1.2w - 1.5w mains draw
30v open circuit
28mA open circuit
 
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