The guy making the correction was corrected.

Then the guy correcting the correction was corrected.

 

Let me correct myself by explanation:
A 12V - 20Ah battery can deliver 12 volts; 1 amp for 20 hours. Or 20 amps for 1 hour.
Automotive batteries are rated at Cold Cranking Amps meaning it may be a 12V - 100Ah battery with 450 CCA, that is 450 amps for a moment during starting a car.

Yes, it's a statement of charge. I misspoke before. Hope this clears up what I wanted to say. If I'm still wrong others will correct me. If that happens - it just means I don't know everything.

 

A summary of some of the main points for this application are ?
Current limiting preceeds the voltage regulation using LM317 in a floating ground configuration.
The TL431 improves the current limiting control and rest of circuit addresses the Rtrickle.
An ltspice provided an accurate view of the charge process.

Thermal considerations regarding current and thermal sense. Δ Caution Battery Hot
The charge current and charge time can be estimated by using a standard 50% depletion with online battery charge calculator
For a new 600mAh LiPO Battery charge current would be 650mA for an hour typically. An old battery will charge slower
(200-650mA) are reasonable numbers. Reducing the battery charge current is recommended ideally Battery 68 to 77 degrees Fahrenheit.
117F is to high, This variety of manual charger you have to monitor the battery temperature and reduce the charge current as needed.
With minimal supervisory protection and thermal sensing, the circuit could run unattended. Hopefully there are no LiPO battery fires,
A charge circuit's prioity includes a safety first approach.
Battery Charge Time Calculator - Footprint Hero