Join Date: Jun 2010
Chapter: West Coast
Model: Ford Taurus
Engine: 3.0L 24v Duratec V6
Rep Power: 21
I prefer to depend on my auto charger which maxes out at 8A and tapers off till it shuts off and goes to maintain. On maintain it charges slow till it reaches preset V and quits and monitors. Cheap for me, local garage sale = $5.
But point well taken, it takes great deal of time to charge a low battery. High charge rate is not good for a battery. Slow and steady makes for a good day.
Chart of the loss of performance posted few posts back.
8A smart charger for $5. Lucky you! My ctek is just 4.3 amps and was over $60. The Solar brand Prologix ones came out soon after and are great value for money seeing they are 10A or 20A chargers with jump start ability. I would have gone with the 20A version if I hadn't got the ctek since that is better for AGM charging.
As much as smart chargers are preferable, I've had one battery on the Taurus last 6.5 years with zero maintenance and the factory battery on another car last 7 years again zero maintenance as well as less than ideal usage. Two batteries actually died after I started giving them periodic smart charging. One was on it's way out but the other went earlier than expected at 3.5 years.
The thing that the smart charger does that the alternator cannot is put in the final 20% or so that the alternator won't because of the many many hours required. Supposedly this greatly increases the life of the battery but I had one that lasted 6.5 years with no smart charging. One thing I should mention is that my lowest starting temperature is in the 30s and 99%+ of the time is mostly no lower than 50 because of the garage. So my battery can probably be more aged and still function compared to elsewhere in the country.
2004 Taurus SES Duratec 107k
Upgrades: Mach RCU & Tweeters, Bluetooth, Ford Cargo Tray, LED Trunk Lighting, Headlight Relays, Adjustable Pedals
Running on: Pirelli Cinturato P7 All Season Plus, Pennzoil Platinum 5w20 & Fram Pro Synthetic Filter, Valvoline MERCON V, Valvoline DOT 3&4, ZEREX G-05, Top Tier Regular Gas
Last edited by rjacket; 01-06-2018 at 09:15 PM.