Samsung Standard Power Charger CAD300UBEB
Samsung put some thought into the design of its car battery charger. Many poorly designed chargers overheat, and they can also cause the battery to overheat, which is the reason many batteries fail to properly hold a charge.
Samsung designed this car charger to not activate until after the phone is attached, so you can keep the charger plugged in at all times without it getting hot. A green light tells you when the phone is being charged. The next "smart" design feature is that the charger provides a fairly rapid charge until the battery reaches about an 80% charge, and then it provides a slow "trickle" charge to slowly take the battery to 100%. That prevents overheating the battery and shortening its life.
However, because of that slow "trickle" charge feature, it is possible for the battery to actually LOSE some of its charge under high drain conditions. For example, if you have a 95% charge, and are using 3G, GPS satellite location, and Google maps, your charge will slowly sink toward about 80%, as those features drain the battery rapidly.
The battery charge is likely to stabilize in the 80% range, and will begin to go up when 3G, the GPS satellite locator, and Google Maps are turned off. And use your task manager to make sure they are REALLY off, and not still running in the background, killing your battery).
Some folks use their car charger for hours each day. A charger used 30 hours a week is going to fail a lot sooner than chargers used one or two hours a week. At Amazon's low price, heavy users should consider buying a couple of the Samsung chargers, and keeping a spare on hand.
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