The replacement TrueCharge 10 arrived today and it's brand new never removed from it's original packaging. For $75.00 I think it's worth the price. Many of the automobile chargers available on the market aren't all that well made, many aren't 3 stage and designed for AGM/GEL. I've had a few of the ~$50.00 ones and none lasted very long. I've use to have an older standard, iirc Sears, 6/2 charger not processor controlled, putting a non modified current and it last nearly 25 years. However they're designed for flooded batts and single stage going as low as 2 amps and don't shut down or produce a proper float charge. The Xantrex Chargers are capable of floating batteries under 1 amp (~.5 amps) processor controlled using PWM (pulse width modulation, imo does a better job charging a battery)
The only other battery charger I've owned in league with the Xantrex Truecharge are RV converter/chargers such as Intellipower, Parallax, etc. and solar chargers such as a Morningstar Tri-star that can be controlled from a connection to a PC through a software app.
Solar chargers are usually more advanced than other battery chargers partially because of cost of maintaining a battery bank(s). Spending thousands of dollars on batteries one needs a good battery charger to get the most life out of them. Charging e.g. a battery correctly such as a RV/Marine and deep cycle batteries last much longer. A Trojan Deep cycle open cell battery is capable of lasting up to ~20 years if properly maintained, A RV/Marine up to ~15 years. Starting batteries on an average are replaced every 3-5 years. Statistically nation wide flooded are replaced nearly twice as often as AGMs. I think partially due to AGMs don't require maintenance. Flooded batteries are often neglected.
I purchased an AGM Optima Yellow Top over 10 years ago ($150.00) and it's still working fine after more than 10 years of regular use. I did make certain the car's alternator was charging ok, regularly cleaned battery terminals and if the AGM every became depleted put it on the Xantrex Truecharge overnight. AGM's I found behave a bit different from flooded when they become depleted, needing a jump, etc. Imo, its better to put them on a AGM charger overnight when they become near depletion.
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At one time I was maintaining four vehicle starting batteries and three RV/Boat batteries and found the Tri-Star solar charger (which requires sun) to be a better design than any of the ac/dc chargers including any of the RV chargers. Which are good but imo not as good as a solar charger, such as tri-star, etc. the main draw-back is solar chargers aren't normally able to convert AC to a DC, and require sunlight.