However, they may not be so great after all. I noticed that after leaving one on a battery for a long period of time, it was actually floating the battery at 14.20V. (I have three more of these chargers, and they range in output up to 14.6V) The recommended float level for low pressure lead acid float charge is 2.25V to 2.27V per cell. So most of our lead acid batteries should be floated at 13.5V to 13.62V. http://batteryuniversity.com/learn/a...d_acid_battery

So I cracked open the case, drew out the schematic, and started fiddling. I was able to adjust the float voltage to 13.55V. If you want to do the same, here is how.

First, using an exacto knife, trace around the bottom of the enclosure cap while pressing down. Make a couple of loops around the base of the thing. You'll notice a different feel once you get down to the enclosure.