Quote Originally Posted by Darron65 View Post
True.

An AGM does not require trickle charging. A gel cell does. Of course any battery will last longer if you only use your charger on the lowest setting.
Per the pointy board it does.

How will you know if you need a new battery? With most cars, a jump start and driving around will bring a low battery back. Try that with a Miata and chances are you will think the battery is history. Not so fast!!

One of the differences with the AGM battery compared to the wet-cell battery is the recharge rate. That is, how fast you can put energy back into the battery. With a wet-cell battery you can "quick charge" it at about 20 amps or more. Usually this is when you would boil the electrolyte right out of the battery. The AGM batteries require a lower charge rate, for a longer time period. If your battery will not crank the engine, you should charge the battery at a rate of 1 amp or less for 18-24 hours. If you try and charge it like a wet-cell battery, you will destroy the battery.
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