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This is from the Handy Bob website on battery charging.
Get the battery manufacturer’s charging specifications and pay strict attention to them. The charger manufacturers are nearly all not setting their equipment up for the voltage that the battery manufacturers specify. The difference between 14.4 & 14.8 volts is not 3%. That difference is nearly 20% of the charging range (12.2 to 14.8 volts). That 20% makes a huge difference in how full the battery gets before the charger shuts off. You can eventually get the batteries full by charging at 14.4 volts, but it takes hours, not minutes.
I think most of the companies selling chargers feel more comfortable going with a lower charge voltage because it does not require as much battery maintenance. (checking the water level) While the may result in less battery capacity the company is not going to be blamed for frying the batteries.
Graham
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