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DieHard Platinum Microprocessor-controlled Battery Charger Engine Starter Reviews
www.sears.com
| 53% of reviewers recommend
(9 out of 17)
Rating Summary
sears-feed
Chicago, IL
“71227 is top of the line”
DieHard Platinum Microprocessor-controlled Battery Charger Engine Starter —
I tested the 71227 charger, and like it. The meter accuracy is within 0.05 volts, and the charging algorithms appear to work quite well, although they are not described in the instructions. I observed that the voltage was generally limited to 15.5 for regular, 16.0 for deep cycle, and 14.7 for AGM batteries. The 40 amp capability is in the form of a long timed pulse of about 2 minutes followed by 15 amps for a similar time period, then repeating until the voltage has risen enough that it isn't required. The amperage isn't constant, it tapers down to limit the voltage in typical CC/CV fashion, although the algorithm appears to actually be more complex. For instance, on a particular AGM battery it went to 15.5 volts near the end of the charge (95%) with current at about 1.5 amps for about 30 minutes and then stopped (completed). I suspect that this was an automatic attempt to condition the battery. A Schumacher SC-800A charger (Schumacher actually makes the DieHard 71227 charger) did the same thing. After three discharge cycles, it stoped doing the "high-voltage treatment". Also, in AGM/DieHard Platinum mode it went to 15.5 volts briefly during one of the 40 amp cycles. Although the instructions for DieHard Platinum (Odyssey) say to choose a charger with <14.8 volts, this charger was obviously designed with these batteries in mind. The only negative I noticed was that if the AC power cycles, after 15 minutes it will come back on as a charger set for regular battery mode and set for 2 amps. I wouldn't recommend leaving an AGM battery connected on maintenance mode. Overall, it's a nice charger. I hope some of the tech info above helps.DieHard Platinum Microprocessor-controlled Battery Charger Engine Starter
is recommended
by WDT3
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